CBSE

Go for the NITs. So kindly visit the official website of NIT for regular updates.

Yes, you can surely get CSE but the colleges may not be good. I would suggest you to apply in SRM or VIT by giving their exams.

You might have a chance if you have any reservation criteria else give it a try. You have very great chance to get into this institute with this rank. Attend the counselling and choose your options appropriately. Try Shiksha college predictor for better analysis.

Top 5 best B.Sc agriculture colleges are listed below do check:
1- Acharya N. G. Ranga Agricultural University
Hyderabad
2-anbil Dharmalingam Agricultural College and Research Institute
Tiruchirappalli
3-Sam Higginbottom Institute of Agriculture, Technology and Sciences
Allahabad
4-Tamil Nadu Agricultural University
Coimbatore
5-G. B. Pant University of Agriculture and Technology
Pantnagar.

Yes, you can seek for admissions in DU. You can go through DU website for the details.