Pickup the correct statements

Options

A. CO which is major pollutant resulting from the combustion of fuels in automobiles plays a major role in photo chemical smog.
B. Photochemical smog occurs in daytime whereas classical smog occurs in early morning.
C. Classical smog has an oxidising character while photochemical smog has reducing character.
D. Classical smog is good for health but not photochemical smog .

Answer

B