X is the daughter of Y. Y is the son of Z. How is X related to Z?

A. GRANDDAUGHTER

In a coded relationship, if A + B means A is the daughter of B, A - B means A is the son of B, and A × B means A is the wife of B, what is the relation of C if A + C × B?

D. C IS THE FATHER OF A

If X + Y means X is the uncle of Y, X - Y means X is the aunt of Y, and X × Y means X is the cousin of Y, what is the relationship of Z if X + Z - Y?

B. Z IS THE NIECE OF Y

M is the uncle of N. N is the daughter of O. How is O related to M?

B. SISTER

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

C. BROTHER-IN-LAW