Directions: Read each sentence to find out whether there is any grammatical error in it. The error, if any will be in one part of the sentence. The letter of that part is the answer.
If the car hadn't broken down we will be at the office now.

Options

A. A) If the car
B. B) we will be
C. C) hadn't broken down
D. D) at the office

Answer

B

Explanation

If two actions happened in the past, the first action should be written in "Had + V (3rd form of the verb (past participle form of the verb)" and the second action should be written in "V (past simple form)". In the given sentence, the breakdown of the car is the first action and subsequently getting late to the office is the second action. Hence, .would have been will be answer.