A sentence has been given in Active/Passive voice. Out of the four alternatives suggested, select the one which best expresses the same sentence in Passive/Active voice.
A child could not have done this mischief.
1
This mischief could not been done by a child
2
This mischief could not have been done by a child.
3
This mischief a child could not have been done.
4
This mischief could not be done by a child.