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

B. MOTHER

A is the daughter of B. C is the son of B. What is the relation of C to A?

A. BROTHER

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

A. SISTER

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

A. SISTER

X is the father of Y. Y is married to Z. Z has a brother W. How is W related to X?

B. SON-IN-LAW