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

C. SISTER-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

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

A. UNCLE

X is the father of Y. Y is married to Z. Z has a brother W. How is W related to X?

B. SON-IN-LAW

O is the grandmother of P. Q is the mother of P. R is the father of P. How is O related to R?

A. MOTHER-IN-LAW