In the questions below the sentences have been given in Active/ Passive voice. From the given alternatives, choose the one which best expresses the given sentence in Passive / Active voice.
A child could not have done this mischief.
1
This mischief could not be done by a child
2
This mischief could not been done by a child
3
This mischief could not have been done by a child
4
This mischief a child could not have been done