Assertion (A):Vehicular emissions, the waste emitted by

Assertion (A):
Vehicular emissions, the waste emitted by cars, buses and so on, are a cause of concern for all environmentalists.
Reason (R1):
The emission contains several gases and particulate material harmful to the health of the people.
Reason (R2):
In cities, the level of emissions from vehicles can be very high.

1. If only reason 1 (R1) and not reason 2 (R2) is the reason for the assertion (A).
2. If only reason 2 (R2) and not reason 1 (R1) is the reason for the assertion (A).
3. If both (R1) and (R2) are reasons for the assertion (A).
4. If neither (R1) nor (R2) is the reason for the assertion (A).

Both the reasons are cause for environmental damage.