Blood Relations – MBA CET questions with solutions

Approach: Decode the relation from the speaker outwards, one link at a time.

Solution:
'Husband of my mother' = Aradhya's father.
'Mother-in-law of Aradhya's father' = mother of his wife.
His wife is Aradhya's mother, so the lady is the mother of Aradhya's mother.
Mother's mother = Maternal Grandmother.

Why the other options are wrong:
A: Paternal grandmother is the father's mother, not his mother-in-law.
B, D, E: Aunt, sister and grand-daughter are not two generations above via the mother.

Cetking shortcut: 'Mother-in-law of my father' is always 'my mother's mother'.

Answer: C

Approach: Blood relation — identify the common person and place both sides around him.

Solution:
'The only son of my mother's father' = Ben's mother's only brother = Ben's maternal uncle (call him U).
Ben says the girl's mother's brother is U, so the girl's mother is a sister of U.
U's sisters are Ben's mother and Ben's mother's sisters.
Ben speaks of 'her mother' as a separate person from his own mother, so the standard reading is that she is another sister of U, i.e. Ben's mother's sister.
Mother's sister = Ben's Aunt.

Why the other options are wrong:
A: this would make the girl Ben's own sister, but the question treats the girl's mother as a different person from Ben's mother.
B, E: the girl's mother is one generation above Ben, so she cannot be his sister or brother.
D: grandmother is two generations above.

Cetking shortcut: Same maternal uncle for both ⇒ the two mothers are sisters ⇒ the girl's mother is Ben's (maternal) aunt.

Answer: C

Approach: Coded blood relations — decode each option, looking for 'M is father of C' and 'C is male'.

Solution:
Need: M is the father (or mother) of C, and C is male.
D: M x N → M is father of N.
N – C → N is sister of C, so C is also M's child.
C + F → C is brother of F, so C is male.
Hence C is the son of M.

Why the other options are wrong:
A: M – N x C → M is sister of N, who is C's father → M is C's aunt.
B: N x M → N is father of M; C is N's brother → C is M's uncle.
C: F x C → F is C's father; M is F's sister → M is C's aunt.
E: F–N+C does not mention M at all.

Cetking shortcut: Start from options where M is followed by 'x' (father) — only D begins 'M x'.

Answer: D

Approach: Pointing relation — 'only son of my mother' is the speaker himself.

Solution:
Suresh is male, so 'the only son of my mother' = Suresh himself.
'He is the son of Suresh' → the boy is Suresh's son.
So Suresh is the boy's Father.

Why the other options are wrong:
A, C: brother / cousin would need the boy to be in Suresh's generation.
B: uncle would need the boy's father to be Suresh's brother, but Suresh is the only son.
E: Suresh is male, not a sister.

Cetking shortcut: A male speaker's 'mother's only son' = himself.

Answer: D

Approach: Blood relations counting: list every female member generation by generation.

Solution:
Mother: 1.
3 married sons ⇒ their 3 wives: 3.
Unmarried daughter: 1.
Two sons have 2 daughters each: 2 × 2 = 4 (the third son's child is a son).
Total females = 1 + 3 + 1 + 4 = 9.

Why the other options are wrong:
A, B: count only one generation.
C (6): misses the daughters-in-law or granddaughters.
E (7): misses the mother and the unmarried daughter, or counts 2 daughters-in-law.

Cetking shortcut: 'Married sons' always hide wives — add them first, it is the most-missed group.

Answer: D

Approach: Blood relation: decode 'only son of my grandfather'.

Solution:
Priya's grandfather's only son must be Priya's father.
Priya says this person is Neha's father ⇒ both share the same father.
Priya is a female name, so Priya is Neha's Sister.

Why the other options are wrong:
A (Mother), D (Aunt), E (Niece): different generation.
C (Cousin Sister): a cousin would need a different father; the 'only son' rules that out.

Cetking shortcut: 'Only son of my grandfather' (paternal side) = 'my father'; reduce such phrases to a direct relation first.

Answer: B

Approach: Decode the phrase from the inside out.

Solution:
His mother's only daughter = his sister.
His sister is Asha's mother → the man is Asha's maternal uncle.
Asha (female) is his niece.

Why the other options are wrong:
A Nephew: wrong gender.
B Sister: his sister is Asha's mother, not Asha.
C Wife, E Grand daughter: one generation off / not linked.

Cetking shortcut: 'Mother's only daughter' = sister; then it's a one-generation gap.

Answer: D

Approach: Work from Kunal's son.

Solution:
Kunal's son's uncle = Kunal's brother.
The old man's son is Kunal's brother → the old man is Kunal's father.

Why the other options are wrong:
A Brother: the brother is the old man's son.
B Uncle, D Grandfather: one generation off.
E Nephew: wrong direction.

Cetking shortcut: Son's uncle = my brother → his father = my father.

Answer: C

Approach: Decode step by step.

Solution:
Her uncle's father = her grandfather.
Grandfather's daughter = her mother (or aunt).
Son of her mother = her brother (cousin is not offered).

Why the other options are wrong:
B Son, D Son-in-law: wrong generation.
C Uncle: the boy is a grandchild of the grandfather, same generation as the girl.
E Nephew: one generation below.

Cetking shortcut: Grandfather's daughter's son is in the girl's own generation → brother.

Answer: A

Approach: Identify the only daughter.

Solution:
The man speaks to a woman: 'only daughter of your father' = the woman herself.
His (the person's) mother = the woman → she is his mother.

Why the other options are wrong:
A Aunt: would need a sister, but she is the only daughter.
C Wife, D Daughter, E Grandmother: wrong generation/relation.

Cetking shortcut: 'Only daughter of your father' addressed to a woman always means 'you'.

Answer: B

Approach: Decode the chain.

Solution:
This man's son's sister = this man's daughter.
She is the woman's mother-in-law → mother of the woman's husband.
So the husband is the son of the man's daughter → the man's grandson.

Why the other options are wrong:
B Son: the husband's mother is the man's daughter.
C Son-in-law: that is the husband's father.
D Nephew, E Brother: not linked this way.

Cetking shortcut: Mother-in-law → husband's mother; count down one generation from the man's daughter.

Answer: A

Approach: Account for all 9 grandchildren by parent and by gender.

Solution:
Physician + Physiotherapist: Anne, Jerry, Ravi = 3 children
Economist: 2 granddaughters
Engineer: 2 grandsons
Total so far = 3 + 2 + 2 = 7, so the Banker has 9 − 7 = 2 children.
Gender check: grandsons 4 = Jerry, Ravi + Engineer's 2; granddaughters 5 = Anne + Economist's 2 + Banker's 2 ✓

Cetking shortcut: Only the Banker's share is not stated → subtract from 9.

Answer: D

Approach: Build a two-generation family tree.

Solution:
Lawyer + Teacher → sons: Engineer, Doctor, Actor.
Ela is the Engineer's daughter; Jola is Ela's brother → Jola is the Engineer's son.
The Doctor is the Engineer's brother → Doctor is Jola's uncle.

Why the other options are wrong:
A) Brother — Jola's brother would be the Engineer's son, not the Doctor.
B) Son, E) Nephew — Doctor is a generation above Jola.
D) Father — Jola's father is the Engineer.

Answer: C

Approach: Decode each symbol and link the relations.

Solution:
G $ M → G is the mother of M.
M @ K → M is the husband of K, so K is M's wife.
K is the wife of G's son → K is G's daughter-in-law.

Why the other options are wrong:
A) Mother, B) Mother-in-law — that is G's relation to K, not K's to G.
D) Sister, E) Daughter — K is related by marriage, not blood.

Answer: C

Approach: Reduce the phrase from the speaker's side.

Solution:
'The only son of my mother' = Ramani himself.
The boy is the son of Ramani → Ramani is the boy's father.

Why the other options are wrong:
A) Brother — would need 'son of my mother/father'.
C) Son — reverses the relation.
D) Uncle — needs another son of his mother.
E) Grandfather — one generation too many.

Answer: B

Approach: Chain the sibling and marriage links.

Solution:
Bhanu is Chirag's sister; Aryan is Bhanu's father → Aryan is also Chirag's father.
Chirag is Dewan's brother → Aryan is Dewan's father.
Esha is Dewan's wife → Esha is Aryan's daughter-in-law.

Why the other options are wrong:
A) Daughter — Esha is related by marriage.
B) Niece, D) Sister — wrong generation/branch.
C) Wife — Esha is married to Dewan.

Answer: E

Approach: Two-generation relation.

Solution:
P is Q's father.
R is P's sister → R is the sister of Q's father.
Father's sister = aunt.

Answer: A

Approach: Pointing-type relation — decode right to left.

Solution:
My father's sister = Aarav's aunt.
Her only son = Aarav's cousin.
Mother of that son = the father's sister herself → aunt.

Why the other options are wrong:
C Cousin – that is the son, not the woman.
A, B, E – no link to sister, mother or niece.

Answer: D

Approach: Pointing-type relation.

Solution:
Rahul is male, so his father's only daughter is Rahul's sister.
The mother of Rahul's sister = Rahul's mother.

Answer: A

Approach: Build a family tree.

Solution:
C is the father of A; A is the brother of B → A and B are siblings.
E is B's daughter; D is E's brother → D is B's son.
A is the brother of D's parent → A is D's uncle (true whether B is father or mother).

Why the other options are wrong:
B Father – D's parent is B, not A.
D Cousin – A is one generation above D.
C, E – no in-law or grandparent link; C is the grandfather.

Answer: A

Approach: Long relation chain — reduce step by step.

Solution:
My mother's husband = Rohan's father.
Father of my father = paternal grandfather.
Only daughter of the grandfather = father's sister (paternal aunt).
Son of the paternal aunt = Rohan's cousin.

Why the other options are wrong:
A Brother – he is not a child of Rohan's parents.
C Uncle – would be grandfather's son.
D Grandfather / E Nephew – wrong generation.

Answer: B

Approach: Build the family tree from the given links.

Solution:
Zara is the mother of Qadira; Chitra and Qadira are sisters → Zara is also Chitra's mother.
Prem is Zara's son → Prem is the brother of Chitra.
Arun is Chitra's son → Prem is the brother of Arun's mother = maternal uncle of Arun.

Why the other options are wrong:
A: Prem is Arun's uncle, not cousin.
C: Qadira is Arun's maternal aunt; Zara is the grandmother.
D: Zara is Chitra's mother.
E: Prem is one generation above Arun, not two.

Answer: B

Approach: Decode each symbol and look for: I is female, I is the child of J's sibling.

Solution: Option D: I × C + N – J
I × C → I is the sister of C (I is female).
C + N → C is the daughter of N → I is also N's child.
N – J → N is the brother of J.
So I is the daughter of J's brother → I is J's niece.

Why the other options are wrong:
A: J – N % C × I → I is N's child, but I's gender is not fixed (could be nephew).
B: I × C – N % J → C is brother of N, N is father of J → I is J's aunt.
C: J + M × C % I → J is M's daughter, M is C's sister, C is I's father → I and J are cousins.
E: N – C % M + I → M is the daughter of I, so I is a parent (C's wife), not a niece of J.

Cetking shortcut: A niece needs a female marker on I — only options starting with 'I ×' (I is sister) qualify; check those first.

Answer: D

Approach: Decode the speaker's relation step by step.

Solution:
Chandrapal is Neha's father-in-law; his only son Omveer must be Neha's husband.
Priyanka is Omveer's daughter → Chandrapal's granddaughter.
Ruchi is Priyanka's sister → also Omveer's daughter → Chandrapal's granddaughter.

Why the other options are wrong: Niece, daughter, wife, daughter-in-law are the wrong generation or link (Neha is the daughter-in-law).

Answer: E

Approach: Build the tree for six members.

Solution:
Q is the daughter of S and P → S is P's husband.
T is the brother of P's husband → T is S's brother.
U is T's mother → U is also S's mother.
Q is R's granddaughter; the only member left for the grandfather slot is R → R is U's husband, father of S and T.
So R is T's father.

Why the other options are wrong: R is one generation above T, so brother, son and nephew are out; uncle would need R to be a sibling of T's parent.

Answer: C

Approach: Decode the known links, then choose the symbol that makes Q a male child of T's sibling.

Solution:
R ÷ S → R is the daughter of S.
S × T → S is the father of T.
So R and T are siblings (R is T's sister).
For Q to be T's nephew, Q must be the son of R → 'Q – R' (Q is son of R).
Q – R ÷ S × T → Q is the son of T's sister → nephew.

Why the other options are wrong:
A (+): Q would be R's wife.
B (×): Q would be R's father.
D (÷): Q would be R's daughter → niece, not nephew.
E: is not a single symbol.

Answer: C

Approach: Decode 'sister-in-law' through the only brother.

Solution:
Sanjeev is the only brother of Aniket.
Eashita is Aniket's sister-in-law → she is the wife of Aniket's brother Sanjeev.
Savita is Eashita's mother-in-law → Savita is the mother of Eashita's husband Sanjeev.
Sanjeev and Aniket are brothers, so Savita is Aniket's mother too (Pranjal, the father, is her husband).

Why the other options are wrong:

• B Mother-in-law – she is the brother's mother, not the wife's mother.
• C Daughter, D Sister, E Niece – wrong generation.

Answer: A

Approach: Simple parent chain.

Solution:
Babita is the daughter of Chitra; Chitra is Dinesh's wife → Dinesh is Babita's father.
Aruna is Babita's sister → Dinesh is Aruna's father too.

Answer: D

Approach: 'My father's son' with no siblings = the speaker himself.

Solution:
David has no brothers or sisters, so 'my father's son' = David.
'The wife of my father's son' = David's wife.
The man's mother is David's wife → the man is David's son.

Why the other options are wrong:

• A Uncle, B Nephew, D Cousin – need a sibling, but David has none.
• E Father-in-law – wrong generation.

Cetking shortcut: The phrase 'brothers and sisters I have none' always collapses 'my father's son' into 'me'.

Answer: C

Approach: Collapse 'only daughter of my father' to the speaker.

Solution:
The only daughter of the woman's father = the woman herself.
Her only brother = Tanya's father.
Tanya is her brother's daughter → Tanya is her niece.

Why the other options are wrong:

• B Sister / D Cousin sister – same generation, wrong.
• A Mother / E Aunt – older generation, wrong.

Answer: C

Approach: Three-generation chain.

Solution:
Balaji is the son of Chaya.
Chaya is the daughter of Diya; Diya is Eknath's wife → Chaya is Eknath's daughter.
Eknath is the father of Balaji's mother → Eknath is Balaji's (maternal) grandfather.

Why the other options are wrong:

• A Uncle / B Father – wrong generation.
• D Mother / E Grandmother – Eknath is male (husband of Diya).

Cetking shortcut: Count generations: Eknath → Chaya → Balaji = two steps down → grandfather.

Answer: C

Approach: Coded blood relations — decode each symbol and build the family chain.

Solution:
Maternal uncle of Q = brother of Q's mother.
Option B: P − M + N × Q.
P − M → P is the brother of M (P is male).
M + N → M is the mother of N.
N × Q → N is the sister of Q, so M is also the mother of Q.
P is the brother of Q's mother → P is the maternal uncle of Q.

Why the other options are wrong:
A: starts with N, not P — says nothing about P.
C: Q − N + M × P → Q is the brother of N, N is the mother of M, M is the sister of P → Q is the maternal uncle of P (reverse of what is asked).
D: Q − S % P → S is the father of P; Q is S's brother → Q is P's paternal uncle (reverse, and paternal).
E: P + S → P is the mother of S, so P is female — cannot be an uncle.

Cetking shortcut: Answer must start with 'P −' (P is a brother) and the middle link must be '+' (mother) — only B.

Answer: B

Approach: Coded blood relations — C must be male and a child of M.

Solution:
Option C: M × N − C + F.
M × N → M is the father of N.
N − C → N is the sister of C, so C is also M's child.
C + F → C is the brother of F, so C is male.
C is a male child of M → C is the son of M.

Why the other options are wrong:
A: N + M − F × C → F is the father of C; M is F's sister → M is C's aunt.
B: F × N − M × C → M is the father of C, but C's gender is never fixed (no '+' after C), so C may be a daughter.
D: F − C + N × M → N is the father of M; C is N's brother → C is M's uncle.
E: M − N × C → M is a sister of N, who is C's father → M is C's aunt.

Cetking shortcut: C must appear after M's child link and must be followed by '+' (brother) to fix gender — only option C.

Answer: C

Approach: Blood relations — locate the married couple, then the parents.

Solution:
Sudeep is the only brother of Ashok, so Sudeep and Ashok share the same parents (Dheeraj is their father).
Veena is Ashok's sister-in-law and Kalyani's daughter-in-law → Veena is the wife of Kalyani's son.
The only brother of Ashok is Sudeep, so Veena is Sudeep's wife and Sudeep is Kalyani's son.
Kalyani is Sudeep's mother (Dheeraj's wife) and therefore Ashok's mother.

Why the other options are wrong:
B, C, E: these are in-law/spouse relations — Kalyani is in the generation above Ashok.
D: a paternal aunt would be Dheeraj's sister; Kalyani is the mother-in-law of Sudeep's wife, i.e. Sudeep's mother.

Answer: A

Approach: Coded blood relations — T must be female and P's child.

Solution:
Option D: P × Q % R − T + S.
P × Q → P is the wife of Q.
Q % R → Q is the father of R, so P is R's mother.
R − T → R is the brother of T, so T is also P's child.
T + S → T is the sister of S, so T is female.
T is a female child of P → T is P's daughter.

Why the other options are wrong:
A: T − S → T is a brother (male) → son, not daughter.
B: T does not appear at all.
C: T is the last term — her gender is never stated.
E: T is the last term — gender unknown.

Cetking shortcut: T must be followed by '+' (sister) in the code — only option D.

Answer: D

Approach: Number-coded blood relations — decode, then check K is a female parent of M's spouse.

Solution:
Option E: M9N5K3J.
M9N → M is the husband of N.
N5K → N is the daughter of K.
K3J → K is the mother of J, so K is female.
K is the mother of M's wife N → K is M's mother-in-law.

Why the other options are wrong:
A: M9N3K4J → N (M's wife) is the mother of K, so K is M's son, not mother-in-law.
B: M9K → K is M's wife, not her mother.
C: K3J9N4M → K is J's mother, J is N's husband and N is M's brother — K is never the mother of M's spouse.
D: K5J9M3N → K is the daughter of J, and J is M's husband → K is M's daughter, not mother-in-law.

Cetking shortcut: Mother-in-law of M = mother of M's spouse: look for 'M9_' followed by '_5K' (daughter of K) and confirm K is female.

Answer: E

Approach: Decode each link, then chain generations.

Solution:
Sunita is Rohit's wife; Puja is Sunita's mother-in-law → Puja is Rohit's mother.
Rohit is Rupali's father → Puja is the mother of Rupali's father.
So Puja is Rupali's paternal grandmother. (Gajanan is the grandfather; Dhanashree, Puja's daughter, is Rupali's aunt — extra information.)

Why the other options are wrong:
A, C: grandson/granddaughter reverse the generation and Puja is female-elder.
D: aunt is Dhanashree, not Puja.
E: Puja is mother-in-law of Sunita, not of Rupali.

Cetking shortcut: Mother-in-law of X's wife = X's mother. One step down from there = grandmother.

Answer: B

Approach: Decode the speaker's statement, then place Ruchi.

Solution:
Neetu's father-in-law is Chandrakant; his only son is Omkar → Omkar is Neetu's husband.
Omkar is Priya's father; Ruchi is Priya's sister → Ruchi is Omkar's daughter.
Chandrakant is Omkar's father → Ruchi is Chandrakant's granddaughter.

Why the other options are wrong:
A: niece is a sibling's daughter.
B: daughter would be Omkar's sister.
C, D: wife / daughter-in-law relate to Chandrakant and Neetu, not Ruchi.

Answer: E

Approach: Decode each symbol and note the gender each one fixes.

Solution:
E + F → E is brother of F (E male).
F @ G → F is father of G (F male).
G * H → G is sister of H (G female).
E and F are siblings and F is male → F is the brother of E.

Why the other options are wrong:
A: G is H's sister, not mother.
D: E is male (brother), so cannot be a sister; E is H's uncle.
E: F is male (father), so not a sister.
B: G is female and F is G's father, so G is also F's daughter — this statement is also true from the data.

Answer: C

Approach: Decode the relation chain from the woman.

Solution: Her mother's brother = her maternal uncle.
The uncle's son = her cousin.

Why the other options are wrong:
A Brother — would be her mother's son.
B Uncle — would be the mother's brother himself.
C Nephew — would be her sibling's son.
E Father — mother's husband, not mother's brother's son.

Answer: D

Approach: Build a family tree.

Solution: A is the mother of B; B is the son of C → C is B's father, so A and C are husband and wife.
D is the brother of C → D is the brother of A's husband.
Husband's brother = brother-in-law.

Why the other options are wrong:
B Uncle — D is B's uncle, not A's.
C Nephew, D Cousin, E Father — no link supports these.

Answer: A

Approach: Family tree; ignore distractor names.

Solution: Vinod is Bhaskar's brother; Manohar is Vinod's (and Bhaskar's) sister.
Preetam is Bhaskar's daughter, Biswal is Preetam's brother → Biswal is Bhaskar's son.
Father's brother = paternal uncle → Vinod.

Why the other options are wrong:
A Bhaskar — father of Biswal.
B Manohar — sister of Bhaskar, i.e. aunt.
C Preetam — sister of Biswal.
E — data is sufficient.

Cetking shortcut: Names do not reveal gender here — "Manohar is the sister" makes Manohar female; trust the stated relation, not the name.

Answer: D

Approach: Coded relations — decode the chain left to right.

Solution: G @ O → G is the mother of O.
O & S → O is the sister of S.
S # V → S is the brother of V.
V $ J → V is the father of J (male).
So the father of J is V, and S is V's brother.

Why the other options are wrong:
B Uncle — S is J's uncle, but the question asks S's relation to J's father.
C Son, D Nephew — S and V are siblings, same generation.
E Brother-in-law — S and V share mother G, so they are real brothers.

Cetking shortcut: Read the question twice: "related to father of J" — stop at V.

Answer: A

Approach: Coded relations — the expression must fix both "sibling of K's father" and "Q is male".

Solution: Option B: K × B → K is B's brother; B ÷ N → N is B's (and K's) father; N × Q → N is Q's brother, so Q is N's sibling; Q × D → Q is D's brother, so Q is male.
Q = male sibling of K's father = paternal uncle.

Why the other options are wrong:
A — Q + D makes Q a sister → paternal aunt.
C — Q is L's brother and R (L's father) is K's brother → Q is K's nephew.
D — Q's gender is not fixed (could be aunt).
E — Q's gender is not fixed (could be aunt).

Cetking shortcut: Paternal uncle needs two things: Q is a sibling of K's father AND Q is male. Eliminate options where Q is the last term (gender unknown) — only A and B remain, and A makes Q a sister.

Answer: B

Approach: Coded blood relations: decode each symbol left to right and join the links.

Solution:
Codes: + = son of, − = wife of, × = brother of, / = mother of, = = sister of.
P + R: P is the son of R.
R − Q: R is the wife of Q, so Q is R's husband (male).
P is the son of R and R's husband Q ⇒ Q is the father of P.

Why the other options are wrong:
B, D, E: these put Q in P's generation or below, but Q is the husband of P's mother.
C: Q is P's parent's husband, i.e. father, not uncle.

Cetking shortcut: Mother's husband = father — two links collapse to one.

Answer: A

Approach: Coded blood relations: decode each symbol and combine.

Solution:
Codes: + = son of, − = wife of, × = brother of, / = mother of, = = sister of.
P × R: P is the brother of R (P is male).
R + Q: R is the son of Q.
P is R's brother, so P is also a child of Q; being male, P is the son of Q.

Why the other options are wrong:
A: P is male (brother), so not sister.
B, C, D: P is in the generation below Q, as Q's child.

Cetking shortcut: Sibling of a son = another child of the same parent; gender comes from the first link.

Answer: E

Approach: Coded blood relations: decode each symbol and combine.

Solution:
Codes: + = son of, − = wife of, × = brother of, / = mother of, = = sister of.
P = R: P is the sister of R (P is female).
R + Q: R is the son of Q.
P is R's sister, so P is also Q's child; being female, P is the daughter of Q.

Why the other options are wrong:
B: P is Q's child, not spouse.
C, E: niece/aunt need another generation link, which is not there.
D: P is the sister of R, not of Q.

Cetking shortcut: Sister of Q's son = Q's daughter.

Answer: A

Approach: Blood relation by description: reduce the chain from the speaker outward.

Solution:
"My father's wife" = Mohan's mother.
"Daughter of my mother" = Mohan's sister.
"The two brothers of my sister" = Mohan himself and one more brother.
The boy playing football is the younger of these two brothers, i.e. Mohan's brother.

Why the other options are wrong:
A, C, D, E: the boy is a child of Mohan's mother, so he is in Mohan's own generation — a brother, not son/father/nephew/cousin.

Cetking shortcut: Father's wife's daughter's brother — every link stays in the same family, so the answer is a sibling.

Answer: B

Approach: Blood relation: build a small family tree from the clues.

Solution:
Sudeep is the only brother of Ashok; Dheeraj is the father of Sudeep (and so of Ashok).
Veena is the sister-in-law of Ashok and the daughter-in-law of Kalyani — so Veena is Sudeep's wife.
Kalyani's daughter-in-law is Sudeep's wife, so Kalyani is Sudeep's mother (Dheeraj's wife).
Ashok is Sudeep's sibling, so Kalyani is Ashok's mother.

Why the other options are wrong:
A, B: Kalyani is a generation above Ashok.
D: she is the parent, not the child.
E: mother-in-law would need Ashok to be married to her child; Ashok is her own child.

Cetking shortcut: Daughter-in-law of K + sister-in-law of A (whose brother is K's son) ⇒ K is the mother of both brothers.

Answer: C

Approach: Blood relations: draw the three-generation family tree.

Solution:
A is the son of C; E is the daughter of A → A is E's father.
F is the mother of E (and of D) → A and F are a couple.
Tree: C (and spouse B) → son A. A is married to F (F is the mother of E, A is E's father). A and F → daughters E and D.
The 'one couple with parents and children' is A–F: parents B, C above; children E, D below.
Parents of the children (E, D) = A and F.

Why the other options are wrong:
A BC: parents of A (the couple), not of the children.
B CF, C BF, D CD: mix members of different generations.

Answer: E