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 daughter of N and N is the sister of O, what is M's relation to O?

A. NIECE

If P is the son of Q and Q is the brother of R, what is P's relation to R?

A. NEPHEW

If S is the grandmother of T and T is the son of U, what is U's relation to S?

B. SON

M is the daughter of N. O is the son of N. How is O related to M?

A. BROTHER