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

C. SISTER-IN-LAW

M is the mother of N. N is the father of O. How is M related to O?

A. GRANDMOTHER

H is the daughter of I. J is the brother of I. How is J related to H?

A. UNCLE

A is the father of B. B is the sister of C. How is C related to A?

C. CHILD

N is the grandmother of O. P is the father of O. How is P related to N?

A. SON