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 man said to a lady, "your mother's husband's sister is my Aunt". How is lady related to the man?
Preeti is Harish's only daughter. Lakhan is Birendra's only son. Lakhan's sister Neeti is married to Manas. Preeti has only one brother, Manas. How is Manas related to Birendra?
Introducing Asha to guests, Bhaskar said, "her father is the only son of my father". How is Asha related to Bhaskar?
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?
