Select the correct passive form of the given sentence.

He drove the car very carefully on the hilly terrain.

The car was driven very carefully on the hilly terrain.

The correct passive form of the given sentence "He drove the car very carefully on the hilly terrain" is The car was driven very carefully on the hilly terrain.

The other options are incorrect because:

• The car is being driven very carefully on the hilly terrain uses the present progressive tense, which is not typically used for actions that happen once.
• The car has been driven very carefully on the hilly terrain uses the present perfect tense, which is not typically used for actions that happen once.
• The car is driven very carefully on the hilly terrain is in the active voice, not the passive voice.