Change the voice: "Who wrote this letter?"

• ক) By whom was this letter written?
• খ) Who was written this letter?
• গ) This letter is written by whom?
• ঘ) By whom this letter was written?

• By whom was this letter written?

যিকোনো এটা বিকল্প বাছি লোৱাৰ পিছত উত্তৰটো চাব পাৰিব।