DIRECTIONS: in the following question, a part of sentence is bold. Below are given alternatives to the bold part which may improve the sentence. Choose the correct alternative. In case no improvement is required, choose “No Improvement” option.
I met the two girls, which I believe, are identical twins.

Options

A. A) who I believe are
B. B) No Improvement
C. C) who to my belief, are
D. D) whom I thought, are

Answer

D

Explanation

whom is used as the Object of a Verb or Preposition.
Look at the sentence :
•Whom did they invite ?
•To whom should I write.
• He asked me with whom I had discussed it.
Here, whom I thought, are is the right usage.