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.
People believe that the prisoner escaped by digging a tunnel.
1
The prisoner is believed to have been escaped by digging a tunnel.
2
The prisoner is believed to have escaped by digging a tunnel.
3
The prisoner is believed to escape by digging a tunnel.
4
They think that the prisoner escaped by digging a tunnel.