G is the brother of F. E is the father of K.. C is the daughter of A. F is the mother of E. C is the sister of E. How is G related to A?

Correct — D. Take the statements in the order that builds the family, not the order they are printed in.

F is the mother of E, and C is the sister of E, so F is the mother of C too.
C is the daughter of A, so A is C's other parent, which makes A the husband of F.

G is the brother of F, and F is A's wife.

So G is A's wife's brother, option (d).

Why the others are wrong

• (a)
  Brother’s wife — Brother's wife needs G to be female. The statement says G is the brother of F, so G is male and cannot be anyone's wife.
• (b)
  Sister’s husband — Sister's husband would make G the husband of A's sister. G's only stated link is to F, and F is A's wife, not A's sister.
• (c)
  Husband’s sister — Husband's sister also needs G to be female. G is called a brother, so no relation beginning with sister can describe him.

Blood-relation puzzles are solved by drawing, not by reading. Put each generation on its own line and add links only as the statements allow.

Two statements do the real work here. F is the mother of E fixes a generation, and C is the sister of E puts C beside E and, crucially, under the same mother.

Only then does C is the daughter of A become useful: A must be C's father, and so F's husband. E is the father of K adds a generation below and is not needed for the question asked.

Key facts

• F is the mother of both E and C, because C is E's sister.
• A is the parent of C who is not F, so A is C's father and F's husband.
• G is F's brother, which makes G the brother of A's wife.

Common traps

• Assuming A is the mother because C is a daughter, which collides with F already being the mother.
• Trying to use the statement that E is the father of K, which adds nothing to the link between G and A.
• Answering from G's side of the family instead of A's, so wife's brother comes out as sister's husband.

No directly related past PYQ was found.