Select the option that expresses the given sentence in active voice.
A new laptop was bought by me yesterday.

Correct option is D

The correct active voice expression is (d) "I bought a new laptop yesterday."
The passive construction "A new laptop was bought by me yesterday" is correctly converted to active voice in option (d), maintaining the simple past tense and direct action by the subject.
Conversion rule:
Past indefinite
Subject + V2 + object. -> <- Object + auxiliary verb (was, were) + past participle + by + subject.