Tree is to Leaf as Flower is to ?

A. PETAL

If X is the daughter of Y and Y is the sister of Z, what is the relationship of X to Z?

A. NIECE

If M is the father of N and N is the son of O, what is the relationship of O to M?

B. WIFE

In a coded relation, if A + B means A is the father of B, A - B means A is the mother of B, and A × B means A is the son of B, what is the relationship between C and D if C - D + E?

A. C IS THE MOTHER OF D

Complete the series: B, D, F, H, ?

A. J