You need to have passed your 12th standard exams (CBSE/ISC/State Boards) with Science stream subjects like Physics, Chemistry, and Biology (PCB) and English. The minimum marks required can vary depending on the college or university

Some colleges might have a minimum age requirement (usually 17 years old).

Depending on the location and college, you might need to qualify for national-level entrance exams like NEET (National Eligibility cum Entrance Test). Many states conduct their own entrance exams for B.Sc. Nursing admissions.Some universities might have their own entrance exams for admission to their B.Sc. Nursing programs.

https://medicine.careers360.com/exams/pgimer-bsc-nursing

I hope it helps!