0 0 votes Which one of the following options contains ONLY primary air pollutants? Hydrocarbons and nitrogen oxides Hydrocarbons and ozone Ozone and peroxyacetyl nitrate Nitrogen oxides and peroxyacetyl nitrate Air Pollution gate2019-ce-2 air-pollution environmental-engineering types-of-pollutants + – Arjun 4.6k points answer Follow 0 reply