Which of the following sentences is in the passive voice?

The correct answer is Option (1) → Why wasn’t the injured goat taken to the vet this morning?

Passive voice:

The subject “the injured goat” does not do the action. Someone was supposed to take it to the vet. The verb is “wasn’t ... taken”, which is was + past participle (V3) with “not”. In a question, “was” moves before the subject and the V3 stays after it. The question and the “not” do not change the voice.

Why the Other Options are Incorrect?

Option 2: Hasn’t the postman delivered our parcel yet? — Incorrect. “Has ... delivered” is has + V3 with no “been”. The postman does the delivering, so this is active (present perfect).

Option 3: Didn’t the children sweep the courtyard before the puja? — Incorrect. “Did ... sweep” is the simple past active. The children do the sweeping and “the courtyard” is the object.

Option 4: Wasn’t Ritu singing at the school function last evening? — Incorrect. “Was ... singing” is was + -ing, not was + V3. Ritu does the singing, so this is active (past continuous).