Can a passenger car that expels more smoke than allowed through the exhaust pipe circulate?

Can a passenger car that expels more smoke than allowed through the exhaust pipe circulate?
A)Yes, as long as they are not harmful gases.
B)Yes, but only outside built-up areas.
C)No.Correct
The circulation of vehicles that emit smoke or gases above the regulatory limits is not permitted. This excessive emission is considered a serious defect that harms the environment and road safety. For this reason, authority agents may proceed to immobilize the vehicle.