Question

17a. Each of the applicants must submit his or her completed form to the interviewer.
17b. Each of the applicants must submit their completed forms to the interviewer.
I chose A. is that right? please explain.

Answer 1

A is correct -- "each" is a singular word; therefore, any pronoun that refers to it needs to be singular also. (The word "their" is obviously plural.)

Answer 2

Thank you