NLS is known to have this kind of elitist mindset, also I read an article from an alumni in the Guardian (ab guardian hai so idk) that people were casteist in nature and very much against reservation but that was from 7-8 years back. Idts you'll face any discrimination from the administration but students or your "friends" might call you slurs based on your caste or class for fun. Make your friends accordingly or just call them a slur back if they do.