Select the correct passive form of the given sentence.
Humayun built a city named Dinpanah in 1533 in Delhi.

Correct option is A

The correct passive form of "Humayun built a city named Dinpanah in 1533 in Delhi" is "A city named Dinpanah was built by Humayun in 1533 in Delhi." This maintains the original meaning and structure in passive voice.
Conversion Rule:
Subject + V2 + object. -> <- Object + auxiliary verb (was, were) + past participle + by + subject.