A sentence has been given in Active/Passive Voice. Out of the four alternatives suggested, select one which best expresses the same sentence in Passive/Active Voice.
The grapes tasted sour.
1
The grapes were sour when tasted.
2
The grapes were sour when someone was tasting.
3
The grapes is sour when it is tasted.
4
The grapes were sour when they were tasted.