X is the father of Y. Y has a sister Z. What is Z's relation to X?

A. DAUGHTER

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

C. SISTER-IN-LAW

A is the grandfather of B. B is the son of C. How is C related to A?

A. SON

X is the mother of Y. Y has a daughter Z. How is Z related to X?

A. GRANDDAUGHTER

X is the father of Y. Y has a sister Z. W is the son of Z. How is W related to X?

A. GRANDSON