What is the passive voice of 'Who did this'?
A By whom this has been done?
B Whom did this?
C By whom was this done?
D Who has done this?
Solution
Correct Answer: Option C
Who যুক্ত past indefinite tense এর passive voice এর structure :By whom +was/were +obj কে sub +verb এর past participle . correct : By whom was this done