A) \[\text{S}{{\text{O}}_{2}}\]
B) \[\text{C}{{\text{O}}_{\text{2}}}\]
C) \[\text{CO}\]
D) \[{{\text{O}}_{3}}\]
Correct Answer: D
Solution :
\[{{\text{O}}_{\text{3}}}\] (ozone) is a secondary pollutant. These are formed by the reaction of primary pollutant. \[\text{CO}\] - Quantitative pollutant \[\text{C}{{\text{O}}_{\text{2}}}\]- Primary pollutant \[\text{S}{{\text{O}}_{\text{2}}}\] - Primary pollutant
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