Since you have PCMB in Class 12 and want to pursue B.Sc. Nursing through BCECE (Bihar Combined Entrance Competitive Examination), you only need to appear for Physics, Chemistry, and Biology (PCB) papers. Mathematics is not required for B.Sc. Nursing. The BCECE exam pattern varies for different courses, and for nursing programs, only PCB subjects are considered. However, make sure to check the official BCECE 2025 notification for any updates on the exam pattern. Focus on Physics, Chemistry, and Biology, as these subjects determine your ranking and admission eligibility in B.Sc. Nursing colleges under BCECE.