Under Government of India's National Air Quality Monitoring Programme (NAMP) covering 312 cities/towns in 29 states and 6 Union Territores of the country, which of the following combination has been identified for regular monitoring at all the location ? Correct Answer Sulphur Dioxide (SO2), Nitrogen Dioxide (NO2), Suspended particulate Matter (PM10) and fine Particulate Matter (PM2.5) The correct answer is option 3. Key Points Central Pollution Control Board initiated National Ambient Air Quality Monitoring (NAAQM) programme in the year 1984 with 7 stations at Agra and Anpara. Subsequently, the programme was renamed as National Air Quality Monitoring Programme (NAMP). To check the air quality of the country, Central Pollution Control Board initiated National Air Quality Monitoring Programme (NAMP) under which three air pollutants viz., Sulphur Dioxide (SO2), Nitrogen Dioxide (NO2) and Particulate Matter size equal to or less than 10 microns (PM10), have been monitored regularly at all the locations. Some of the objectives of the NAMP- To determine the status and trends of ambient air quality To ascertain whether the prescribed ambient air quality standards are violated To Identify Non-Attainment Cities To obtain the knowledge and understanding necessary for developing a preventive and corrective measure Additional Information Presently, the network consists of 804 operating stations covering 344 cities/towns in 28 states and 6 Union Territories of the country.