By whom was this picture painted? (Make it active)

- Passive: By whom was this picture painted?
- Active: Who painted this picture?

• By whom যুক্ত Passive Voice-কে Active Voice করার নিয়ম:
- প্রথমে Subject হিসেবে Who বসে।
- Tense অনুযায়ী verb বসে।
- Passive Voice -এর Subject - Object হয়ে বসবে।

• More examples:
- Passive: By whom was the letter written?
- Active: Who wrote the letter?

- Passive: By whom was the decision made?
- Active: Who made the decision?