Photochemical smog occurs in warm, dry and sunny climate. One of the following is not amongst the components of photochemical smog, identify it.

Photochemical smog occurs in warm, dry and sunny climate. One of the f

1.	Photochemical smog occurs in warm, dry and sunny climate. One of the following is not amongst the components of photochemical smog, identify it.
A.	\[N{{O}_{2}}\]
B.	\[{{O}_{3}}\]
C.	\[S{{O}_{2}}\]
D.	Unsaturated hydrocarbon
Answer» D. Unsaturated hydrocarbon