Direction: In the following questions, a sentence has been given in Active voice. Out of the four alternatives suggested, select the one which best expresses the same sentence in Passive voice.

प्र:

The Municipal Corporation changed the manhole covers before the rainy season.

• 1
  The manhole covers is being changed before the rainy season.
• 2
  The manhole covers are change before the rainy season.
• 3
  The manhole covers were changed before the rainy season.
• 4
  The manhole covers can be changed before the rainy season.