Hello vidyasagar ,

There are various eligibility criteria to write JEE advance ,

Candidate must have passed +2 with a minimum aggeregate of 75% however there is relaxation of10% for SC/ST and PwD candidates.as they need the minimum aggeregare of 65% marks.

Candiates must also have secured a rank among top 2,24,000(including all categories ) candidates in JEE mains. 

He/she should not have been appeared for JEE  advance on or before 2017.

the minimum rank remanis same for all the categories but there are reserved seats for EWS candidates .

Hope this information helps

All the best ....!!!