Answer:
Option 2)
Burned gases will not be released into the surrounding air.
Explanation:
Given that the exhaust system on a heat engine is not functioning properly.
An exhaust system is a system which transfers  waste gases and other combustion products away from an automobile engine.
This system is the reason for  the vehicle to operate with minimal noise, smoke and pollution transmitted to the environment.
An improperly maintained exhaust system leads to the storage of burned gases inside only because the system is essential to the clean and efficient operation of the car
So option 2 is right.
