If S is the grandmother of T and T is the son of U, what is U's relation to S?

B. SON

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

D. BROTHER-IN-LAW

If D is the mother of E and E is the father of F, what is D's relationship to F?

A. GRANDMOTHER

If M is the brother of N and N is the sister of O, what is O's relationship to M?

D. SIBLING

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

A. BROTHER