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

B. BROTHER

If G is the son of H and H is the mother of I, how is G related to I?

A. BROTHER

If M is the sister of N and N is the brother of O, how is M related to O?

A. SISTER

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

M is the grandmother of N. O is the mother of N. What is the relation of O to M?

A. DAUGHTER