Exam

You can go for engineering or you can go for Bachelors in maths. After that, you can go for Masters in field of maths. If you are going for engineering, than after graduation you can go for MS in research oriented fields from US university.

You can check on below link the college you can get based in your JEE Rank. Check this-
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor

You can check the college you can get based on your JEE rank and round of counselling. Check on this link-
https://goo.gl/ZVgVBm

Hi Xeeshan,
You have a decent score, but you cannot get the SRM main campus as your rank will be lower, but you can get other campuses.
Since the exams have got over, the ranks and cut-offs will be released maybe on the 2nd of May. So, you can see which campuses you can get here:
www.srmuniv.ac.in
All

Hello Devashish,
Even though you have scored quite less, being from SC quota, I feel you have lot of chances in getting admission in some or the other NIT in some branch.

Hello Puneethan,
As per your rank, CSE is a bit tough for you, but wait till the counselling, you may get a seat in the category 3,4 or 5.
All the best.