1 Answers
Option 4 : (E)
The sentence is grammatically correct.
The correct option is 4 i.e. D.
This is a conditional sentence and in this type of sentence, one sentence depends upon others because of cause and effect.
In this case, this type of sentence follows a special structure
Conditional word- If, until, unless, as soon as, when, while, since etc.
1. Conditional word + subject + v1/v5 + object, subject + will + v1 + object.
2. If + subject + v2 + object, subject + would + v1 + object.
3. if + subject + had + v3 + object, subject + would + have + v3 + object.
4. Had + subject + v3 + object, subject + would + have + v3 + object.
Generally, these structures come to fulfil the condition.
The given sentence follows the rule no 4 and according to the rule, there is no error in the given sentence.