Single Puzzles

A. P B. Q C. R D. S E. U

The question is wrong because:

1. The conditions R is immediately to the left of S and V is immediately to the right of R force a rigid block: R–S and R–V, which is structurally conflicting.
2. If R is immediately left of S, then the only position to the right of R is occupied by S, leaving no place for V.
3. Thus, V cannot be immediately to the right of R simultaneously, making the conditions mutually inconsistent.
4. Due to this contradiction, no valid arrangement of all seven books is possible.
5. Hence, the question has no feasible solution.