Dear Harsh, if you are talking about NEET UG, then even Private Candidates are eligible for appearing in NEET. You have to fulfil only 2 clauses. One is that you should complete 17 years by December 31st of year of admission and the other is Aggregate clause. You should have completed ypir 10+2 with a minimum aggregate of 50% in Biology, Physics, Chemistry. Its 50% if you are from General Category, 45% for PWD and 40% for SC, ST,OBC