Which one of the following options contains ONLY primary air pollutants?

Q. Which one of the following options contains ONLY primary air pollutants?

(A) Hydrocarbons and nitrogen oxides

(B) Hydrocarbons and ozone

(C) Ozone and peroxyacetyl nitrate

(D) Nitrogen oxides and peroxyacetyl nitrate

Ans: Hydrocarbons and nitrogen oxides