Consider the following air pollutants:

Q. Consider the following air pollutants:

i. NO

ii. PAN

iii. CO2

iv. CO

Which of the above air pollutants is/are present in an auto exhaust gas?

  1. i only
  2. i and ii
  3. ii and iii
  4. i, iii and iv

Answer: i, iii and iv

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