sir wat percentage required to apply bsc nursing and how many years of training

The basic eligibility criteria says that, candidates must have passed 10+2 or equivalent with Physics, Chemistry, Biology and English with at least 50% marks in aggregate. It is a four years course i.e. the nursing training will be conducted for 4 years. You can check other details such as other criteria for applying, exam dates, nursing colleges, counselling process etc. from the link below-
http://medicine.careers360.com/articles/indian-army-bsc-nursing-application-form