Which one is better between Bio M.Ed and B.Tech in terms of job opportunities?

Depends on your knack actually. If bioscience interests you, which includes the entire spectrum of organisms, then biotech is the way. But, you need to have your basics in organic chemistry crystal clear. Biotech would be tough otherwise. I assume, you are a class 12th student, so take up biotech on

Obviously, you'll get more jobs opportunities with batch government as well as private.