If C is brother of B, B is son of A, D is father of C and A is female, then A is
Wife of D
A is the wife of D — option 3.
Take the statements one at a time.
| Statement | What it establishes |
|---|---|
| C is the brother of B | C and B are siblings, and C is male |
| B is the son of A | A is a parent of B, and therefore of C as well, since B and C are siblings |
| D is the father of C | D is the father of C, and so of B |
| A is female | A, being a female parent, is the mother |
Put it together. A and D are the two parents of the same children, B and C. D is the father, A is the mother. Therefore A is the wife of D.
The family tree :
D (father) — A (mother)
↓
C (son) and B (son)
Why each wrong option fails.
| Option | Why not |
|---|---|
| Sister of D | A is a parent of D’s children; if she were his sister the children would be her nephews, not her sons |
| Husband of D | Contradicts the statement that A is female — and this is the option the question is really guarding, since a candidate who works out the marital relation but ignores the last clause will pick it |
| Mother of D | Would make A the grandmother of B and C, not their mother, contradicting “B is the son of A” |
The method. Draw the tree rather than reasoning in words: put each generation on its own line, join spouses horizontally and children by a vertical line, and mark sex as soon as it is stated. The clue that A is female comes last but is decisive, so read every clause before answering.
Hence, the answer is Wife of D.
Important Questions from General Blood Relation Problems
A is father of B. B is sister of C. C is sister of D. D is the son of E. How many women are there?
Introducing a lady, Varun said, “The son of her only brother is the brother of my wife”. How is the lady related to ‘Varun?
Gopi said to Vivek, "That person is the father of the only brother of my mother."
What would Gopi call him?
A is the son of C, but C is not the mother of A. B is A’s sister. C and D are a married couple. E is the mother of C. Who is A’s mother?
Vijay is the father of Sanjay’s mother. Sanjay is the son of Vijay’s only son-in-law. How is Vijay’s Son-in-law related to Sanjay?
