The numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10 are placed in ten slots of the following grid based on the conditions below. Numbers in any row appear in an increasing order from left to right. Numbers in any column appear in a decreasing order from top to bottom. 1 is placed either in the same row or in the same column as 10. Neither 2 nor 3 is placed in the same row or in the same column as 10. Neither 7 nor 8 is placed in the same row or in the same column as 9. 4 and 6 are placed in the same row.
Q. 1 What is the row number which has the least sum of numbers placed in that row?