Select the option that expresses the given sentence in active voice.
A new invention has been made by him.

Correct option is C

He has made a new invention is the correct active voice form, clearly identifying the subject (he) and the action (made).
· Active Voice- Active voice is a grammatical structure in which the subject of the sentence performs the action expressed by the verb.
· Passive Voice- Passive voice refers to a grammatical construction where the subject of a sentence undergoes an action rather than performing it. In passive voice sentences, the emphasis is on the recipient or object of the action.
Conversion rule:
Object + auxiliary verb (has, have) + been + past participle + by + subject -> <- Subject + has, have + V3 + object.