Which has better scope: astrophysics, data science, artificial intelligence, biotechnology or nanotechnology?

The fields you have mentioned are all somewhat different and offer different career prospects. Nobody can say that which has a better scope because that depends on your area of interest. Nevertheless, based on the industry trends and my understanding, the most demanding streams are Artificial Intell

Hello Amal Das, You have given list of all very interesting, the latest specialisations and asking for scope. Okay. Let me attempt. Astrophysics is comparatively old subject and it's scope is limited to research and hence if you are really fascinated & interested in research, you should not venture.