Correct option is A
Option (a) contains an error.
· The verb phrase
“had been entered” is incorrect because
“enter” is not used in passive form here.
· The subject
“he” is the
doer of the action (he would enter the competition), not the receiver.
· So, the correct phrase should be
“If he had entered a fatstock competition”.
Grammatical rule used:
· In third conditional structures:
If + had + V3, not passive form unless the subject is being acted upon.
· “Had been + V3” is passive, and here, the sentence demands
active voice.
�� Information-booster:
Use the third conditional to express hypothetical outcomes of past actions. Active voice is needed when the subject performs the action.