Which one of the following is a major indoor air pollutant in India ?

PYQ SSC JE (Junior Engineer) 2013

Which one of the following is a major indoor air pollutant in India ?

  1. A.

    Ozone

  2. B.

    Peroxy Acetyl Nitrite (PAN)

  3. C.

    Carbon monoxide

  4. D.

    Sulphur dioxide

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