Question

In which sentence is the pronoun whom correctly used? Do you know whom is the whale’s most threatening predator? It was she whom took the picture of the whales. We will talk to qualified applicants whom apply to be captain. Is he the man whom they selected to be captain of the ship?

Answer 1

Is he the man whom they selected to be captain of the ship?

Answer 2

The answer to your question would be that the sentence in which the pronoun "whom" is used correctly is the following one: Is he the man whom they selected to be captain of the ship?

Whom should be used to refer to the object of a verb or a preposition. In this case, whom functions as the object of the verb selected.