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

Correct — A.
Rule: a father's brother's wife is an aunt.

C is D's father.
B is C's brother, so B is D's uncle.
A is B's wife, so A is D's aunt → option (a).

Why the others are wrong

• (b)
  Mother — Mother would make A the wife of C, D's father. A is married to B, C's brother, so she is not D's mother.
• (c)
  Sister-in-law — Sister-in-law is A's relation to C, her husband's brother, not to D. The question asks how A is related to D.
• (d)
  Grandmother — Grandmother would put A two generations above D. A is married to C's brother, so she is in C's generation, one above D.

Chain statements are solved by walking from the person asked about to the target, one link at a time, and marking generations. C and his brother B sit one level above D.

A enters by marriage, as B's wife, so she takes B's level and B's side of the family: the wife of D's paternal uncle, an aunt. Sister-in-law names her link with C, not with D.

Key facts

• A father's brother is a paternal uncle, and his wife is an aunt.
• A woman is the sister-in-law of her husband's brother.
• Spouses sit in the same generation of a family tree.

Common traps

• Answering Sister-in-law, which is A's relation to C, the person in the middle of the chain
• Reversing the question and giving D's relation to A, nephew or niece, instead of A's relation to D

No directly related past PYQ was found.