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

A. SISTER

X is the father of Y. Y is married to Z. What is Z's relation to X?

B. DAUGHTER-IN-LAW

P is the uncle of Q. Q is the daughter of R. If R is P's brother, how is R related to Q?

A. FATHER

M is the grandmother of N. N has a brother O. How is M related to O?

C. GRANDMOTHER

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

A. BROTHER