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