Which course is better in multimedia among BA and B.Sc?

There is no difference. It is just the terminology that is different. The syllabus is pretty much the same.

B.Sc. In multimedia and animation and B.A. In animation, are similar to each other. There is no such difference in both UG degree courses. It may vary from college to college, but is more beneficial to do B.Sc. As it offers you better career opportunities. Hope it helps.