Who did this? (Make the sentence Passive)

সিভিল সার্জনের কার্যালয়, ফেনী • স্বাস্থ্য সহকারী • 2025 • 2025-06-20

ABy whom was this done?

BWho has done this?

CBy whom this has been done?

DWhom did this?

সঠিক উত্তর: A. By whom was this done?

সংক্ষিপ্ত ব্যাখ্যা

Past Indefinite interrogative-কে passive করলে structure হয় ‘By whom + was/were + object + V3?’ তাই ‘By whom was this done?’ সঠিক।