Question

In which sentence is the predicate nominative correct?

Answer 1

The answer is D) Her. And this is a subject. (Her ; subject.)

Answer 2

The correct answer is actually A. This is he.

Nominative means that the noun/pronoun in question has to be in its subjective form. The only pronoun among these that can be used as a subject is HE. The other pronouns (him, them, and her) are all objective pronouns, and can therefore never be predicate nominatives.