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

A. SISTER

D is the son of E. F is the daughter of D. How is E related to F?

B. FATHER

N is the son of O. P is the sister of O. How is P related to N?

A. AUNT

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

A. BROTHER

P is the daughter of Q. R is the father of P. S is the sister of R. How is S related to Q?

A. SISTER-IN-LAW