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?

Correct Option: (d) Q is a sister of the husband of S

Let's break down the blood relations step by step: 1) P has a son and a daughter. 2) Q and R are children of P (so Q and R are siblings, one is a son and the other is a daughter). 3) S is the mother of T. 4) S is R's spouse (meaning R and S are husband and wife). Since R is a child of P and S is R's spouse, S is married to R. Q is the sibling of R. Therefore, Q is the sibling of S's husband (R). Thus, Q is a sister of the husband of S (if Q is female) or brother of the husband, but let's check the options: (d) Q is a sister of the husband of S. Since R and Q are children of P, and R is married to S, R is S's husband. Q is R's sibling. Hence Q is a sibling of S's husband. Thus, option (d) correctly describes the relationship.