Hai aspirant, I hope you are doing good, as Bsc nursing is a 4 years under graduate course in medical field . Candiates who have passed 12 class with at least 50 percent with biology or have completed diploma in nursing are eligible for b sc nursing. Every university conduct its own entrance, after qualifying the exam in counseling according to ranks in merit list you will be able to get admission top rank holders got government seat and others have chance to enroll themselves in private Insitutes
The topmost nursing Insitutes are
1) AIMS new Delhi
2) AFMC Pune
3) christisn medical college chennai
4) madras medical college
5) Government medical college nagpur
6) Himachal pradesh university
For more information

https://www.careers360.com/courses/b-sc-nursing