Which will be the most demanding profession in future in India?

Your information is wrong. India has surplus engineers and there is acute shortage of doctors ( Dentist are in surplus not doctors). Data Analysis will be the most preferred profession for some time to come.

This is half truth. Look, if you do course of Doctor and Engineering from good institute, you can certainly get good job. Trending options now are of course Engineering, Doctors, MBA, CA, CS, ICWA, Civil services like IAS, IFS, IPS, mass communication, Journalism, Foreign language learning, etc.