what is scope of BIO-MEDICAL ENGINEERING???

plese give me information about this feild

Which feild is better for me,civil or computer engineering?

I do not have the subject idea and i donot have enough time to do higher studies. I want to do job+business. I am good at mathematics and i still can work hard to improve it but i need limited physics and chemistry.I have just 4 years to study because my father is working very [...]