In almost all Indian metropolitan cities like Delhi, the major atmospheric pollutant(s) is/ are

Suspended particulate matter (SPM)

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Oxides of sulphur

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Carbon dioxide and carbon monoxide

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Oxides of nitrogen

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Solution

The correct option is A Suspended particulate matter (SPM)
Particulate matter consists of soot, fly ash, dusts of various types, fur, hair, spores, pollen grains etc. Particulate matter is differentiated into settleable (particles larger than 10 micrometer) and suspended (particles less than 10 micrometer). In most of the indian cities, particulate matter is an important air pollutant.

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