What is the best Cyber Security course for a working professional in India?

It makes no difference which stream you come from; what matters is that you gain the talent and have the ability to demonstrate to the business what values you bring to the table.
Some certification courses, such as EC-Council, SANS, and Offensive Security, will be required. Once you have a fundamental understanding of how computers and networks function, how data/information moves, and what the various protocols are, along with some of the above-mentioned courses, you will be able to pursue a career in cyber security over time with focused hard work.
If one has the right personality, dedication to learn the right skill set, and the acumen to work on continued research projects related to the technical domain, it will help the individual in the cyberspace domain and will help them sustain in the cyber security domain for a longer period of time.