Correct Answer: I am not helped by Ajit with my homework.

Solution : The second option is the correct choice.

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 simple present tense is: "Singular object + am + past participle form of the main verb + 'by' followed by the agent of the action."

Therefore, the correct answer is: "I am not helped by Ajit with my homework."