you can generally obtain a migration certificate even if you haven't completed your degree, as long as you are leaving your current institution to pursue further studies elsewhere.in your case, dropping out of your BSc 2nd year to enroll in a BA program at a different college would qualify for a migration certificate, even if the colleges are not affiliated with each other.

Contact the examination department of your current college (where you are dropping out from) to initiate the process of obtaining a migration certificate. Along with that transfer certificate, and a duly filled application form is also required to complete transfer process from one college to another.

Good luck!!