Choose the correct option which best expresses the same sentence in P…

The correct answer is Option (2) → By whom will I be helped?

Passive of a "who" question in the future:

Change	Active	Passive	Why
Agent (by ...)	Who	By whom	The question word who (the doer) becomes by whom, which opens the question.
Object becomes subject	me	I	Me becomes I.
Tense kept	will help	will I be helped	“Will help” becomes will be + past participle, and the question order puts the helping verb before the subject: “will I be helped?”
Full sentence	Who will help me?	By whom will I be helped?

Example: Who will cook dinner? → By whom will dinner be cooked?

Why the Other Options are Incorrect?

Option 1: By whom I shall be helped? — Incorrect. The helping verb does not come before the subject, so it is not a question in form.

Option 3: By whom would I be helped? — Incorrect. Would changes the tense and turns the plain future into a condition.

Option 4: By whom I will be helped? — Incorrect. The tense is right, but the word order is that of a statement, not a question.