‘He heard her sing‘. The passive voice of the sentence is_

[পররাষ্ট্র মন্ত্রণালয় প্রশাসনিক কর্মকর্তা পদে নিয়োগ পরীক্ষা ২০১৯ : 2019]

1. She was heard to sing by him.

2. She was heard sing by him .

3. She is heard to sing.

4. She was heard to be sung.

Answer

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