Hello, I'm Swarup kumar Adhikary. I have done BBA in Hospital Management and I have 1.5 year work experience. But now I want to do MBA.

You can apply in IIMs in any of the cities in which you are living. Before that, you must give CAT examination and achieve good percentile to get good colleges like IIM Bangalore, IIM Kolkata etc. And that's great you have a work experience; it will help a lot in your ongoing journey.