Air 4 Upsc 2024. The measurement of air quality is based on eight pollutants, namely, pm10, pm2.5, no2, so2, co, o3, nh3, and pb; Noida girl and law student smriti mishra bagged air 4 in the upsc cse 2022.

She says she checked her rank 12 times to believe she got such a high rank. The upsc prelims 2024 has been conducted on 16th june 2024.