BCA

Yes, BCA in science course is available at MIT Arts, Commerce & Science College.
Rs 1,82,800 for 3 years course fee.
Admission Details:
Admission Procedure
Every eligible candidate has to pass a Common Entrance Test to be conducted by the respective Institute/College. Minimum Eligibility:
HSC (10+2) from any stream with English as passing Subject with minimum 40% marks in aggregate.

To be honest, the word Best is very subjective. It all depends from person to person. There are various factors that will go into making an institute the Best for you. Academics is clearly a priority, but there are also other aspects such as facilities for research, affordability, placement opportunities, and so on. Top colleges in India who offer BCA course:
1. Institute of Management Studies Noida
2. Christ University Bangalore
3. Geeta University, Panipat
4. Xavier's Institute of Computer Application, Ahmedabad
5. Symbiosis Institute of Computer Studies and Research, Pune.

The following are the top MCA colleges in India with best placement facilities.
1. NIT Trichy
2. NIT Surathkal
3. Birla Institute of Technology, Mesra
4. PSG College of Technology, Coimbatore.

Hi,
Yes, it is possible in most of colleges. Generally, the allocation of seats to change to any particular branch is done on basis of a merit list on the score of your first-year performance. You can ask to the college directly. They will tell you more clearly.