Explanation:

Under the National Air Quality Monitoring Programme (NAMP), all of the following pollutants are monitored:

Sulphur dioxide (SO2)

Oxides of nitrogen as NO2

Suspended particulate matter (SPM)

Respirable Suspended Particulate Matter (RSPM / PM10)

NAMP, overseen by the Central Pollution Control Board (CPCB), focuses on monitoring these key air pollutants to assess the air quality in different parts of the country. Therefore, all four of the listed pollutants are monitored under NAMP