Hi Mahima!

B.Sc is Bachelor of Science which is a undergraduate course of duration of 4 years. The eligibility criteria of B.Sc nursing course is completion of +12 with physics,chemistry,biology. To pursue B.Sc nursing you should have all the 3 subject mentioned in +12. If not there are many other B.Sc courses other than B.Sc nursing which you can do without physics and chemistry.

Hope this helps.

All the best!