Explanation:

- A sits 2nd from one of the ends. Thus, A can be either in the 2nd or 4th position in Row 1.

- C does not sit next to E. This places C in one of the leftmost or rightmost positions where E is not adjacent.

- R sits to the right of T. In Row 2, T cannot be in the rightmost position.

- B is married to E, who has one child. So, E is B’s spouse, and A is B’s child.

- A’s son sits immediate right of A. So, A is female, son is immediate right.

- B’s father faces A. Hence, B's father is in Row 2 facing A directly.

- E's mother-in-law sits opposite to the one who sits 3rd to the right of A.

- P and her granddaughter Q are not sitting together. Means they are separated.

- The arrangement fits best with B and C beside A, with P opposite C, and each position filled by familial connections.

- Who sits opposite to the one who sits immediate left of R? If arranged properly, D sits opposite to the one left of R.

- Based on these clues, D is opposite the left-nest person to R, confirming:

Answer: D