The passive form of 'who has broken the glass is-
by who have the glass been broken?
by whom has the glass been broken?
by whom have the glass been broken?
whom has the glass been broken?
সঠিক উত্তর:
by whom has the glass been broken?
ব্যাখ্যা ও নোট:
Who এর পরিবর্তে By whom + tense ও person অনুযায়ী Auxiliary verb (has) + object এর subject (the glass) + been + মূল verb এর past participle form.