Today B.Sc Nursing is more promising than B.Sc Biotechnology. This is because B.Sc has a very limited scope as a biotech career. But with BSc Nursing, you may have better options. And you can easily get a job as a paramedical staff in and out of hospitals with a good salary. In my personal view B.Sc Biotech is a strugling thing. You will be hunting for job afterwards and nothing will be found. Also you can welcome Biotechnology after graduation in nursing as well.

Hope this may help you. All the best.