Computer Science

.No, it is unlikely that you get computer Science branch in IIIT in any IIIT with 86 percentile in JEE Mains whether you belong to OBC NCl category.

You can check other colleges like NITs or GFTS, but it is unlikely that you get computer Science branch easily in those also 

Thank you

Having ranked as PwD category 527 in JEE Main, you get a very good opportunity to excel and obtain B.Tech in Computer Science (CS) or Computer Science and Engineering (CSE) in best Delhi colleges in home state quota. Closing ranks in institutes such as DTU, NSUT and IIIT Delhi are usually much lower in the PwD category than in the general categories of applicants. To give an example, the earlier PwD centralized home state cutoffs of CSE in the IIIT Delhi were between the range of 1.6-4.5 lakh. To get the maximum opportunity to get admission, you must keenly attend JAC Delhi counseling.

Yes, Christ University Delhi NCR does offer a B.Sc. in Computer Science, specifically a B.Sc.  (Computer, Mathematics, Statistics). Additionally, they offer a B.Sc. in Data Science & AI. The Delhi NCR campus also offers a B.Sc.  (Economics, Mathematics, Statistics). 

 No, You don't need KCET for getting into B.Sc Maths or B.Sc Computer Science in most colleges. As long as you've cleared 12th with Maths as a subject, you're good. Most colleges either give direct admission based on marks or have their own entrance test (rare). Still, double-check with the college you're eyeing, especially private or top-tier ones. But yeah; KCET isn't the gatekeeper here.