Disciplines of science that are beneficial for UPSC exam preparation include biology, geography, and environmental science. Knowledge in these fields is relevant due to their connection with current issues such as health policies, climate change, and urban planning. Understanding basic scientific principles assists candidates in comprehending socio-economic factors that influence governance. Moreover, a strong foundation in these subjects equips aspirants with analytical skills necessary for tackling logical reasoning and problem-solving questions in the exams. Thus, integrating science into their study approach enhances candidates' overall preparedness.