In these questions, sentences are given with blanks to be filled in with an appropriate word(s). Four alternatives are suggested for each question. Choose the correct alternative out of the four alternatives.

We have two telephone operators, _____ of them do you want?

Options

A. who
B. whom
C. which
D. what

Answer

C

Explanation

which (Pro.) : used in questions for asking somebody to be exact about one or more people or things from a limited number
Here, which is the right usage.