Phil is one of the boys who _____ going to sing at the festival tonight.
Which of the following options correctly completes the sentence above?

Question

Quizplus · Accepted Answer

The relative pronouns -who, which- must be followed by a verb that agrees with its antecedent in number and person. A pronoun's antecedent is the noun to which it is referring. In this sentence, the antecedent is "the boys" and it needs a plural verb (are).
The verb "is" would require a singular subject. 
The verb phrases "have been" and "being" are used incorrectly in the other options.

Phil Is One of the Boys Who _____ Going to Sing