Photochemical smog pollution does not contain

Options

A. Carbon dioxide
B. PAN (Peroxy acetyl nitrate)
C. Ozone
D. Nitrogen dioxide

Answer

A

Explanation

Photochemical smog is formed in traffic congested cities where warm condition and intense solar radiation are present. It has mainly `O_3` , PAN and `NO_x` . It is called brown air and grey air when solar radiation is intense and lesser respectively.