A is the brother of B. C is the sister of B. D is the father of C. How is D related to A?

Question

A is the brother of B. C is the sister of B. D is the father of C. How is D related to A?

1. A. Father (Correct answer)
2. B. Uncle
3. C. Brother
4. D. Grandfather

Correct Answer

Option A — Father

Detailed Solution & Explanation

The correct answer is Father.

Key Points

• Build the family tree step by step: A is B's brother and C is B's sister, so A, B and C are all children of the same parents — one sibling group.
• D is the father of C; since A is C's sibling, D is automatically A's father too.
• 'Uncle' would need D to be the parent's sibling, and 'Grandfather' would need an extra generation — neither extra relation is given.
• In blood-relation questions, first lock the sibling group, then attach the outsider to any one member; the relation transfers to all siblings.