If S is the grandmother of T, and T is the son of U, how is U related to S?

B. SON

K is the mother of L. M is the father of L. How is M related to K?

B. HUSBAND

If D is the daughter of E and E is the sister of F, what is the relationship of D to F?

A. NIECE

X is the father of Y. Y is the daughter of Z. What is the relation of Z to X?

B. WIFE

K is the grandmother of L. M is the father of L. How is M related to K?

C. SON-IN-LAW