Book : Author :: Painting : ?

A. ARTIST

If J is the father of K, and K is the daughter of L, what is the relationship of J to L?

B. FATHER-IN-LAW

Dog is to Bark as Cat is to ?

A. MEOW

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

B. SON

Tree is to Leaf as Flower is to ?

A. PETAL