Correct option is D
PAN stands for
Peroxyacyl Nitrate, which is a secondary pollutant formed in the atmosphere as part of photochemical smog. It is produced by the reaction of hydrocarbons and nitrogen oxides (NOx) under the influence of sunlight. PAN is toxic to plants and animals and is one of the major components of smog.
Key Facts about PAN:
1. It is a powerful eye irritant.
2. It contributes to respiratory problems.
3. It is formed in urban areas with high vehicular pollution.
4. It plays a role in ozone formation and degradation.
