Hey,
Both B.Sc in Physics and B.Sc Major in Physics are same. When you opt for Bachelor of Science in Physics,then that means,your ''major'' becomes Physics. The basic eligibility criteria for Bachelor of Science in Physics,is you need to complete your 12th from Science stream with Mathematics as one of the main subjects. Most of the institutions take admission on the basis of your 12th marks while some conduct their own entrance tests.
Hope this helps you.
Good luck.