Hello student ,
As you know biotechnology is wider subject and it almost covers microbiology topics in it .Where as micro biology is the basic subject which deals with the life cylcles of microbes . So after 12th I will suggest you to go for biotechnology as it offers different types jobs in different field like it is easier to go into forensic science or Marine Biology or Pharmaceutical Studies or Environmental Sciences with Bachelors in Biotechnology rather than Microbiology.
Hope it will help you !
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