X is the father of Y. Y is the mother of Z. How is Z related to X?

A. GRANDSON/GRANDDAUGHTER

X is the father of Y. Z is the mother of Y. What is Z's relation to X?

B. WIFE

P is the uncle of Q. Q is the daughter of R. How is R related to P?

B. SISTER

A is the grandmother of B. C is the mother of B. How is A related to C?

B. MOTHER

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

A. SISTER