Hello Subhajit Chatterjee,
As far as I think, every career has the best opportunity if you are worth it. The human society has always had successful gurus, experts and leaders from all spheres of life and all disciplines of education. So whatever we do after the higher secondary, we must try to acquire expertise in that subject. I fervently believe that even in this present day competitive market, there is still good enough chance for skills and expertise in any subject.
The career option should not be decided or imposed objectively. Instead, it should be opted for subjectively, keeping in mind the aptitudes of the student concerned. If anyone has the right combination of vision and execution, I believe that nothing on this earth can stop him or her. Even for the same product, while one vends them in the train compartment, another person might run an international business on the same. So it is a matter of how you visualise and execute it.