Computer Science and Engineering

In my opinion, you should select VIT, Vellore because, VIT, Vellore is a good institute for computer science and engineering.

You should be under top 1500 AIR if you are from general category.

1. MET Institute of Engineering - [MET]
2. RH Sapat College of Engineering, Management Studies and Research
3. Sandip Institute of Technology and Research Center - [SITRC], Nashik
4. Jawahar Education Society's Institute of Technology Management & Research [JIT]

In my honest opinion, out of the choices you've mentioned, IIIT Sri City is the best to go for and there are reasons to support this.
The first and foremost aspect that puts IIIT-S ahead of other colleges is research. The college believes in conducting research programmes that are developmental in na

Yes, you get the college as your rank is low so you get it check about more college which you can get with your rank:
https://www.shiksha.com/b-tech/resources/comedk-college-predictor

All are just normal colleges which offer B.Tech if you are unable to get IITs and NITs if you wish to do B.Tech then you may join any of them and please try to give your best in the semester exams so that you get campus selection easily.