Select the correct passive form of the given sentence.
The king declared the war over after 3 years.
1
The war is going to be declared over by the king after 3 years.
2
The war should have been declared over by the king after 3 years.
3
The war was declared over by the king after 3 years.
4
The war was going to be declared over by the king after 3 years.