Consider the following air pollutants:1. NOX (oxides of nitrogen)2. PAN (Peroxyacytyl nitrate)3. CO2 (Carbon dioxide)4. CO (Carbon monoxide)Which of the given air pollutants is/are present in an automobile exhaust gas?

• A. 1, 3 and 4
• B. 1 and 2
• C. 1 only
• D. 2 and 3