Which on^ of the following is not included in the National Air Quality Index? a

The National Air Quality Index (AQI) in India, launched in 2014, monitors eight specific pollutants to determine air quality levels. These pollutants are Particulate Matter (PM10 and PM2.5), Nitrogen Dioxide (NO2), Sulphur Dioxide (SO2), Carbon Monoxide (CO), Ozone (O3), Ammonia (NH3), and Lead (Pb). While the question lists 'Sulphur' as an option, the AQI specifically measures Sulphur Dioxide (SO2). However, in the context of standard competitive examinations like UPSC, 'Sulphur' is often used interchangeably with its oxide form in simplified lists, or the question implies that all listed elements (Nitrogen Dioxide, Lead, and the Sulphur component) are indeed part of the index. Since Nitrogen Dioxide and Lead are explicitly included, and Sulphur (as SO2) is a core component, none of the provided options are excluded from the index.

Sources

1. [1] https://cpcb.nic.in/displaypdf.php?id=bWFudWFsLW1vbml0b3JpbmcvQnVsbGV0aW5fQVFJX05BTVBfT2N0MjAxNS5wZGY