M is the sister of N, and O is the son of N. What is M to O?

A. AUNT

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

B. MOTHER

J is the uncle of K. K is the daughter of L. How is L related to J?

C. SISTER-IN-LAW

If A is the brother of B, and B is the sister of C, what is the relationship of C to A?

A. SISTER

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