Hello Aspirant, hope you are doing good.

So, firstly congratulations for your excellent rank in JEE Advanced, it's not easy at all, so head's up for your efforts. Now, coming to your rank, under OBC category, you have fair chances of getting in some of the NITs and IITs. It's not really probable that you will get Computer Science in most of them, but you might get other branches like IT, ECE, EEE and many other branches.

If you want to know about all the possible colleges that you can get into, with your JEE Advanced rank, you can find it here:

https://engineering.careers360.com/jee-advanced-college-predictor?icn=QnA&ici=qna_answer

Hope this helps you. Good Luck!