Photochemical Smog is a resultant of the reaction among:

 a) CO, O2 and peroxvacetyl nitrate in the presence of sunlight
 b) CO, CO2  and O2 at low temperature
 c) High concentration of NO2 , O3 and CO in the evening
 d) NO2, O3 and peroxyacetyl nitrate in the presence of sunlight
SSC CGL-15

Option (d)r
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