Hey Radhika,
I guess you are not clear with your question.
If you are asking about the institutes for BCA here is a list of them:
There are many institutes in West Bengal also
The admissions have already started in many colleges. There are direct admissions and also admissions by entrance exam, after which you will be directed to a counseling process.The online applications has been started
Regarding B.Tech CS,it a engineering degree in the field of computer sciences.BCA and B.Tech are completely different courses with differences in study matter and other aspects also.
Regards.
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