The photochemical smog is formed by

A. Nitrogen oxide

B. Hydrocarbon

C. Nitrogen oxide and hydrocarbon

D. Solar radiations upon nitrogen oxides and hydrocarbons

Answer: Option D

Solution(By Examveda Team)

The photochemical smog is formed by solar radiations upon nitrogen oxides and hydrocarbons.
Summer smog is primarily associated with the photochemical formation of ozone. During the summer season when the temperatures are warmer and there is more sunlight present, photochemical smog is the dominant type of smog formation.
These pollutants react in the atmosphere with sunlight to form secondary pollutants that also combine with the primary emissions to form photochemical smog.