O is the grandmother of P. Q is the mother of P. R is the brother of Q. How is R related to O?

B. SON

P is the uncle of Q. R is the sister of P. How is R related to Q?

A. AUNT

P is the grandmother of Q. R is the father of Q. How is P related to R?

A. MOTHER

A is the uncle of B. B is the daughter of C. C is the sister of D. How is D related to A?

B. SISTER

M is the father of N. N has a son O. How is O related to M?

A. GRANDSON