There are no such mandatory rules for BCA to be eligible for the course. If you have passed the 10+2 with 50% marks atleast in any stream then you are eligible for the BCA course.

Some of the BCA colleges in Uttarakhand are:

Graphic Era University, Dehradun

DIT University, Dehradun

Surajmal Agarwal Private Kanya Mahavidyalaya, Kichha

College of Engineering Roorkee, Roorkee

Graphic Era Hill University, Dehradun

For more BCA colleges visit the link below:

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

I hope this answer helps. All the very best for your future endeavors!