BCA

Eligibility Of the Master of Computer Applications [M.C.A]
Graduation in any stream is the basic eligibility for MCA. The eligibility for qualifying marks in graduation differs from institute to institute. Most of the institutes require 45 to 50 % aggregate in qualifying exam for taking admission. Reserved categories get some relaxation in aggregate percentage.Apart from this there is another prerequisite for taking admission in MCA degree; one must have studied Mathematics in 10+2 as a compulsory subject.

You can pursue BCS and then do a course related to networking, it will boost your career in networking engineering.

Hello Sachin,
Please refer to this link to get more insights of the colleges and branches:
https://www.shiksha.com/b-tech/resources/kcet-college-predictor
However, as per your rank, you will get good colleges, go for B.Tech.

Hello Malar Vani,
You may refer the following link given below for the list of colleges in Chennai for Bachelor of computer applications (BCA) course:
https://www.shiksha.com/it-software/colleges/bca-colleges-chennai
All the best!

Yes, you can apply in any of the colleges in India. For that, check out the top colleges on the basis of your 12th marks and any of the entrance examination or go for the university examination.
Hope for the best and best of luck from my side.

Always go with the course you seem interested in. Don't follow anyone, make your own path and don't divert. Just follow your passion and success will come to you in no time.
Choose a course in which you see your future.