Question

complete the sentence with the best relative pronoun.
stephen hawking, □ doctors first diagnosed with amyotrophic lateral sclerosis at the age of twenty - one, overcame his debilitating disease to become a world - renowned researcher in the fields of theoretical physics and cosmology.

Explanation:

The sentence is a non - restrictive relative clause. The relative pronoun "whom" is used because it refers to a person (Stephen Hawking) and is the object of the verb "diagnosed" in the relative clause. In non - restrictive relative clauses referring to people, when the pronoun is the object, "whom" is the appropriate choice. "Who" is used as the subject, "whose" shows possession, and "which" is used for non - human things, so "whom" fits here.

Answer:

whom