Correct Answer & Explanation
Option A
Let's analyze the given relations:
• A is the father of B.
• B is the sister of C. This means A is also the father of C.
• C is the only daughter of D. Since A is the father of C, and C is the only daughter of D, D must be the mother of C.
• If A is the father and D is the mother of C (and B), then A and D must be a married couple.
• Therefore, D is the wife of A.