Correct option is D
All the questions were answered correctly by Ankur in the interview. This option is the only one that correctly and fully converts the sentence from passive to active voice, keeping the original meaning intact. It correctly uses the past simple tense, which is appropriate for actions completed in the past.
Grammatical rule used: In converting from passive to active voice, the original object becomes the subject, and the passive verb form (was/were answered) is replaced by the active form (answered).
Past indefinite
Subject + V2 + object. -> <- Object + auxiliary verb (was, were) + past participle + by + subject. Example: The student answered all the exam questions correctly.