Computers & IT (Non-Engg)

I would suggest you for BCA. For its more wide option, you can trust UEM, Kolkata. For best college for your preferred course for its placement record and education, you can visit:https://www.shiksha.com/university/university-of-engineering-and-management-kolkata-47398 to get good understanding of the college

If you are interested in Computers, then you can go for BCA or B.Sc (IT)
Good luck.

CV Raman is a good university, they have good infrastructure as well as placement records.
After BCA, you can opt for a job Like Software tester, junior programmer etc.
If you are planning for Higher studies, then you have go for MCA (If you are interested in programming) or MBA in Information technology or PGDM.

I would add one more college to the list you have collected so far. UEM, Kolkata is best among it due to its placement assistance and infrastructure. Visit https://www.shiksha.com/university/university-of-engineering-and-management-kolkata-47398 to get more glimpse about college and its admission process

You will get government college, because your rank is less than 500.

You will get government college, because your rank is less than 500.

There is no link between NEET and graphic designer. You need to join any institute to become a graphic designer.
Some institutes that provide graphics designing course are:
NID
HT Campus
TGC
Admecindia

GATE exam mainly compromises of core fields like CSE, ME, EE, ECE, CE, etc.
Your field is electronics with software technology, I don't think GATE will allow you to appear in the exam.
You should have thought before taking this stream if you wanted to appear for GATE.

Computer science engineering (CSE) is one of the popular courses among engineering aspirants which focuses on the basic elements of computer programming and networking. Students pursuing computer science courses will gain knowledge of design, implementation and management of information system of both hardware and software. Going by the name, CSE course deals primarily with the theory of computation and design of computational systems. The course is offered across the globe in technical institutions at undergraduate as well as postgraduate levels awarding B.Tech and M.tech degrees, respectively.

Hello Subhasmita,
After almost six years you want to resume studies. Great indeed. You can take up any course out of the lot you mentioned and there are enough employment opportunities. Work hard and you will succeed.