X is the father of Y. Y is the sister of Z. W is the brother of X. How is W related to Z?

A. UNCLE

If X is the father of Y and Y is the son of Z, what is Z's relation to X?

C. WIFE

If P is the uncle of Q, and Q is the daughter of R, what is the relationship of R to P?

C. BROTHER-IN-LAW

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

A. SISTER

If X is the daughter of Y and Y is the sister of Z, what is the relationship of X to Z?

A. NIECE