Photochemical smog consists of excessive amount of `X`, in addition to aldehydes, ketones, peroxyacetylnitrite `(RCO_(3)NO_(2))` and so forth `(X)` is

Photochemical smog consists of excessive amount of X in addition to aldehydes, ketones, PAN etc.X is

Photochemical smog consists of excessive amount of X in addition to aldehydes, ketones, PAN etc.X is

Photochemical smog consists of excessive amount of X, in addition to aldehydes, ketones, peroxyacetyl nitrate (PAN), and so forthe X is:

Photochemical smog consists of excessive amount of X in addition to aldehydes, ketones , PAN etc, X is

Photochemical smog consists of excessive amount of X, in addition to aldehydes, ketones, peroxyacetyl nitrate (PAN), and so forth X is:

Photochemical smog consists of (A) SO_(2),PAN and smoke (B) SO_(3),PAN and oxides of nitrogen (C) SO_(2),CO_(2) and hydrocarbon (D) O_(3),SO_(2) and hydrocarbon