Question

Complete the sentence with the most suitable option:
The students in the early class, _____________________, did very well on yesterday's maths test.

• A. They study very hard all semester
• B. Very few of them had studied very hard
• C. Most of whom had studied the night before
• D. They studied hard last week

Answer 1

Answer: (C)

Most of whom had studied the night before

Non-defining relative clauses are made of relative pronouns like "whom" in order to give us non-essential information about a person or persons, here the students. Hence, Option C is correct. The rest of the options do not adhere to this goal, hence incorrect.