For most of the colleges offering BCA, the admission to the course of BCA is stream independent. So you can take admission to the course being a student from any of the stream. In most college you are eligible for the BCA and usually the admission are on the basis of 10+2 score.

Now there are some college which conducts entrances as well as there are some colleges which requires Mathematics as a subject compulsorily in 10+2. So depending on the institute you are going for, the admission process may vary.

For more information regarding BCA consider the link below:

https://www.careers360.com/courses/bca-bachelor-of-computer-applications

For the colleges in India offering the course of BCA in India consider the link below:

https://it.careers360.com/colleges/list-of-bca-colleges-in-india

I hope this helps. Wish you a great eve!