If G is the mother of H and I is the sister of H, what is I to G?

A. DAUGHTER

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

A. NIECE

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

A. SISTER

If A is the sister of B and B is the mother of C, what is A's relation to C?

A. AUNT

If M is the father of N and N is the son of O, what is the relationship between M and O?

B. HUSBAND AND WIFE