If M is the grandmother of N and N is the son of O, what is the relationship of O to M?

A. SON

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

A. SISTER

If N is the sister of O and P is the brother of O, what is the relationship of P to N?

B. BROTHER

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

A. SISTER

If J is the uncle of K and L is the sister of K, what is L to J?

A. NIECE