Select the option that expresses the following sentence in passive voice.
He had cleaned the bathroom.

Correct option is C

The correct passive voice of the given sentence is "The bathroom had been cleaned by him."
Conversion Rule:
· Active Voice Structure:
· Subject + had + past participle (V3) + Object
· He had cleaned the bathroom.
· Passive Voice Structure:
· Object + had been + past participle (V3) + "by" + Subject
· The bathroom had been cleaned by him.
Why this is correct:
· The given sentence is in Past Perfect Tense ("had cleaned").
· In Passive Voice, "had been cleaned" is used instead of "had cleaned."
Incorrect Options Explanation:
· (a) "has cleaned" → Incorrect as "has" changes the tense to Present Perfect.
· (b) "had cleaned" → Incorrect as "had been cleaned" is required in Passive Voice.
· (d) "has been cleaned" → Incorrect as it changes the tense to Present Perfect Passive.
Thus, option (c) is the correct answer.