Question

Who did this ?

( choose the correct ‘passive’ form of the above sentence)

a)  Who is the person to do this?

b)  Who was the person to do that?

c)   By whom was this done?

d)  By whom was that done?​

Answer 1

Answer:

c)   By whom was this done?

Answer 2

Answer:

By whom was this done ?

is the. answer