I have completed a b.sc. microbiology, I'm interested in business so what I do and which field is best for me
Hello Aspirant ,
Since you've decided on what to do next , going into business has basically two options open. Now that you're done with an undergraduate , you can go on to pursue MBA that will give you some understanding about the whole business and corporate world. MBA will teach you some important concepts , you will get some hands on experience from internships and work in a company for a while to understand how things work.
The other option could be to start a business in a field you're interested in , learn from others , take advice and start your own thing. This however requires some time and patience to have an idea and execute it perfectly. Then you can start crowd funding , going for competitions and grants to finance your startup. The field , however , I cant suggest anything as it based solely on your interest. Find something that helps the society and that you're interested about.
All the best!