If N is the sister of O and O is the father of P, what is N's relationship to P?

A. AUNT

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

A. NIECE

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

A. M IS THE GRANDFATHER OF P

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

B. WIFE

If M ÷ N means M is the daughter of N, M + N means M is the son of N, and M - N means M is the sister of N, what is the relationship of O if M ÷ N + O?

D. O IS N'S SON