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

A. SISTER

If P - Q means P is the sister of Q, and Q + R means Q is the brother of R, what is the relationship between P and R?

A. SISTER

If M × N means M is the father of N, and N + O means N is the sister of O, what is the relationship between M and O?

B. UNCLE

H is the uncle of I. J is the sister of I. How is H related to J?

A. UNCLE

K is the son of L. M is the sister of L. How is M related to K?

A. AUNT