Select the option that expresses the given sentence in passive voice.
The surgeons were operating on a defective heart in the operation theatre.

Correct option is B

✔️ Correct option: (b) A defective heart was being operated on by the surgeons in the operation theatre.
· Definition of Voice:
· Active Voice: The subject of the sentence performs the action (e.g., The surgeon operated on the patient).
· Passive Voice: The subject receives the action performed by someone else (e.g., The patient was operated on by the surgeon).
· Explanation:
· The given sentence is in past continuous tense in active voice.
· Passive voice of past continuous uses: was/were + being + V3.
· The verb “operate on” is a prepositional verb. In passive form, the preposition “on” is retained after the object.
· Grammatical rule used:
· Active form: Subject + was/were + verb-ing + object
· Passive form: Object + was/were + being + past participle (V3) + by + subject
· Hindi Explanation: Passive voice में क्रिया का प्रभाव object पर होता है। Past continuous के passive में 'being' और क्रिया का तीसरा रूप (V3) प्रयोग होता है। Prepositional verbs में preposition को हटाया नहीं जाता।
· Meanings of all the other options:
· (a) – "has been operated" is in present perfect tense; doesn't match the original tense.
· (c) – "will have been operated" is in future perfect tense; changes the meaning and time.
· (d) – "was operated" is simple past tense; the continuous aspect is lost.