As you have Physics and Mathematics course in BSc, then you can obviously apply for the Airport Authority of India ATC examination. You should keep in mind that you need to score a minimum of 60% marks in your UG course, in order to be eligible for the examination.

**The postponement of the examination is dependent on the organizers of the examination. If the covid rates gets very high then it may get postponed but its not certain.

I hope this helps. Wish you a great eve!