Difficulty: Medium
Correct Answer: P x Q % R - T + S
Explanation:
Decode option (b) step by step P x Q ⇒ P is wife of Q. Q % R ⇒ Q is father of R (so P & Q are parents of R). R - T ⇒ R is brother of T ⇒ T is sibling of R (child of P & Q). T + S ⇒ T is sister of S ⇒ T is female.
Conclusion T is a daughter of P. Other options fail to enforce both parentage and female gender consistently.
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