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.

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