Admission to a B.Tech program typically requires a background in Mathematics, along with Physics and Chemistry. Since you studied Biology instead of Mathematics, you might face eligibility issues for standard B.Tech programs.

However, there are some options to consider:

1. Bridge Courses: Some colleges offer bridge courses in Mathematics for students from a Biology background to meet the eligibility criteria.

2. Biotechnology or Biomedical Engineering: Certain specializations like Biotechnology or Biomedical Engineering might accept students with a Physics, Chemistry, and Biology background.

3. Diploma to Degree Programs: Completing a relevant diploma course in engineering may provide a pathway to a B.Tech program.