Select the option that expresses the given sentence in passive voice.
The police had caught the thief on the day before yesterday.

Correct option is B

The correct passive voice is (b) The thief had been caught by the police on the day before yesterday.
Active Voice: When the subject of the sentence performs the action, the sentence is in active voice.
Passive Voice: When the subject of the sentence receives the action, the sentence is in passive voice.
Explanation:
· Active: Subject + had + V3 + object
· Passive: Object + had been + V3 + by + subject
Structure:
· Active: The police had caught the thief →
· Passive: The thief had been caught by the police
Grammatical Rule:
· Past perfect in active → Past perfect passive: had + been + V3
· Example: They had completed the work → The work had been completed by them.