'He heard her sing.' The passive voice of the sentence is -

A She was heard to sing by him

B She was heard sing by him

C She is heard to sing

D She was heard to be sung

Correct Answer: Option A

Need, watch, dare, make, hear, feel ,let, know, behold, প্রভৃতি verb এর পর Active voice এর to উহ্য থাকে। তবে Passive করার সময় তাদের পরে to বসে।