Hello,

Yes, you're eligible to appear for UPSC exam, you need to pass graduation in any discipline from a recognized university, the upper age limit varies as per the category, for example for General candidates is 32 years old, for OBC/disabled defence service personnel it's 35 years, for SC/ST and ex-servicemen it's 37 years,  for person with benchmark disability-EWS it's 42 years.