Hi there. 

The excellence of the field depends upon the person who is undertaking it. 

All the fields mentioned in the question aren't full fledgedly well established in India but have booming markets. People are getting more and more interested towards the field of genetic engineering, biotechnology, and microbiology. 

Take the field where your passion and interest lies. If you are still confused talk to people who are already in the field. Take help of websites like Quora and listening to some Ted Talks might give you a proper insight of the respective fields. 

Hope this helps.