P has a son and a daughter. S is the mother of T. S is R's spouse. Q and R are children of P. Then how is Q related to S?

Mental Ability & Logical Reasoning ·Previously asked in UPSC Civil Services Examination 2026

View the full solved paper: GS Paper II

Question

P has a son and a daughter. S is the mother of T. S is R's spouse. Q and R are children of P. Then how is Q related to S?

  1. A. Q is a sister of S
  2. B. Q is a daughter of S
  3. C. Q is the mother of S
  4. D. Q is a sister of the husband of S (Correct answer)

Correct Answer

Option D — Q is a sister of the husband of S

Detailed Solution & Explanation

The correct answer is Option D.

Key Points

  • Q and R are children of P; S is R's spouse and the mother of T.
  • So R is S's husband, and Q (being R's sibling) is therefore the sister of S's husband.

Additional Information

  • P has a son and a daughter, so among Q and R one is the son (R, married to S) and the other the daughter (Q). Q is thus "a sister of the husband of S" → Option D.