Which one of the following gases is most significant as air pollutant? Options: A . &nbspCarbondioxide B . &nbspOxygen C . &nbspNitrogen D . &nbspSulphur-dioxide

Which one of the following gases is most significant as air pollutant?

Question

Which one of the following gases is most significant as air pollutant?

Options:

A . Carbondioxide

B . Oxygen

C . Nitrogen

D . Sulphur-dioxide

Answer: Option D

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