Hey Monu

The syllabus of BSc Nursing entrance exams mainly focuses on key aspects of Physics, Chemistry and Biology of Class XII level hence NCERT is the basic for BSc nursing exam however the key points are to Understand the Concepts , Review the Syllabus , Understanding the Exam Pattern , Making an Effective Routine , Prepare Notes and go through  go through the sample or previous years question papers . Besides all this I would highly recommend you to join any online platform of study like Vedantu or Unacademy. All the best.