Hello aspirant!
Answering your question-
The eligibility criteria to get admission in BSc nursing is the candidate should atleast score 45% marks in his 12th boards.
The minimum age for admission  is 17 years on 31st December of the year in which admission is sought. Minimum education: 10+2 class passed with Science (PCB) & English Core/English Elective with aggregate of 45% marks from recognized board under AISSCE/CBSE/ICSE/SSCE/HSCE or other equivalent Board.
Hope this helps you.