Correct Answer: Leave has been applied for by Harsh.

Solution : The correct choice is the third option.

Passive voice is the voice in which the object experiences an action rather than the person who performs the action. Hence, the object in the active sentence becomes the subject in the passive voice.

The structure of the passive voice in the case of the present perfect tense is: "Singular object + has + been + past participle form of the main verb + prepositional phrase."

Therefore, the passive form is: "Leave has been applied for by Harsh."