The correct pollutants in drinking water in certain parts of India are arsenic, fluoride, and uranium. Arsenic is primarily found in groundwater in regions like West Bengal and Assam, where it poses serious health risks due to long-term consumption. Fluoride, while necessary in small amounts for dental health, is detrimental in excess, particularly in areas like Rajasthan and Gujarat. Uranium, a heavy metal, can contaminate groundwater in regions with certain geological formations. In contrast, sorbitol and formaldehyde are not recognized as common drinking water pollutants in India, aligning with the focus of UPSC on understanding environmental hazards relevant to public health.