UPSC has policies regarding reservation for various categories in the Civil Services. These include provisions for Scheduled Castes (SC), Scheduled Tribes (ST), Other Backward Classes (OBC), and Persons with Disability (PwD). The reservation policy aims to provide equal opportunity to underrepresented communities in the administrative services. It influences the number of candidates selected based on their category, thus aspiring candidates should be aware of these policies to better understand the selection dynamics.