Hello candidate

IISER stands for Indian Institute for Science Education and Research. It is a research intensive training institute. Unlike the IITs they do not offer engineering courses and only offer natural sciences courses. Although they offer admission based on JEE Advanced in their 4 year natural sciences undergraduate degree programs, they also conduct their own test to admit students in their dual degree programs which is a 5 year long programme. To be eligible for admission via the IIT-JEE (Advanced) channel, candidates must have secured a rank within 15000 in the common rank list (for candidates belonging to GEN/OBC categories) or in the respective category rank lists (for candidates belonging to GEN-EWS/OBC-NCL/SC/ST/PWD categories) of JEE(Advanced). Additional cut-off criteria for marks obtained in 10+2 board examination is also applicable. The cut-off marks in (10+2) as eligibility for admissions is: 60% marks in aggregate or equivalent grade for GEN/OBC and OBC-NCL categories and 55% for SC/ST/PWD in any recognized board.

So, you can see that you are eligible for taking into admission under the OBC category, but in the last allotment.

Feel free to ask your queries here.