Which one of the following pollutants is not measured under the National Air Quality Index launched by India?

Which one of the following pollutants is not measured under the National Air Quality Index launched by India?
[A]Nitrogen dioxide
[B]Carbon monoxide
[C]Methane
[D]Ammonia

Methane
The National Air Quality index will consider eight pollutants that impact health. These are P particulate matter PM 10 and PM 2.5, nitrogen dioxide, sulphur dioxide, ozone, carbon monoxide, ammonia and lead.

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