If M is the uncle of N, and N is the daughter of O, what is the relationship of O to M?

C. BROTHER-IN-LAW

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

A. SISTER

K is the daughter of L. M is the son of L. N is the sister of M. How is K related to N?

A. COUSIN

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

C. MOTHER

P is the daughter of Q. R is the son of S, who is the sister of Q. How is R related to P?

A. COUSIN