Pronoun case for who and whom

23a. Jon Bon Jovi, who is a well-known singer and actor, also owns an arena football team.
23b. Jon Bon Jovi, whom is a well-known singer and actor, also owns an arena
Please what is the correct answer?
I chose (A).

A is correct, yes!

Thanks

The correct answer is (A) - "Jon Bon Jovi, who is a well-known singer and actor, also owns an arena football team."

In this sentence, the pronoun "who" is the correct choice because it functions as the subject of the clause "who is a well-known singer and actor." The pronoun "who" is used to refer to the person performing the action, which in this case is Jon Bon Jovi, who owns an arena football team.

On the other hand, if you were to use "whom," it would indicate that it is the object of a verb or preposition. For example, "Jon Bon Jovi, whom I admire greatly, also owns an arena football team." In this sentence, "whom" is correct because it is the object of the verb "admire." However, in the original sentence, "who" is the appropriate pronoun since it refers to the subject of the clause, not the object.