Photochemical smog primarily consists of secondary pollutants that form when sunlight reacts with pollutants such as nitrogen oxides and volatile organic compounds (VOCs). The common components of photochemical smog include ozone ( O3 ), nitrogen oxides such as nitric oxide ( NO), and peroxyacetyl nitrate (PAN). Therefore, the correct combination is: Option D O3 (ozone) NO (nitric oxide) PAN (peroxyacetyl nitrate)
