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

B. GRANDMOTHER

If A + B means A is the brother of B, and B - C means B is the sister of C, what is the relationship of A to C?

A. BROTHER

If X * Y means X is the mother of Y, and Y + Z means Y is the brother of Z, what is the relationship of X to Z?

C. MOTHER

If M + N means M is the sister of N, and N * O means N is the father of O, what is the relationship of M to O?

A. AUNT

D is the father of E. E is married to F. What is F's relation to D?

B. DAUGHTER-IN-LAW