MAT

Hello Amritash,
MAT is the entrance examination to get yourself admitted to colleges other than IIMs, such as private colleges.
If you want international colleges, then go for G-MAT.
All the best for your future.

You may get XIME. Get the best possible score in MAT. All the best.

Yes, IBS does accept CAT score.

If you are working, or is in the final year of graduation and is ready to give CAT next year, then surely that's the best option. You can attempt other entrances like XAT CMAT NMAT etc. And try to GET into a good college. But, do make sure you do something productive or take some new courses to add to your CV while dropping the year, because during interviews you might have to justify the year gap. Otherwise, if you don't have any high expectations on the placement side then you can right away take admission in colleges like NDIM, Jaipuria Institute, SCMS Cochin, Alliance Bangalore, ITM Navi Mumbai etc.

It's hard to manage both, but if you can, then you can go for that.

Top MBA Colleges in India Accepting MAT are mentioned at the link provided below:
https://www.shiksha.com/mba/ranking/top-mba-colleges-in-india-accepting-mat/2-2-0-0-306
There are over 155 MBA colleges accepting ICET in India Offering 180 Courses. Please refer to the link provided below for a detailed list of these colleges:
https://www.shiksha.com/mba/colleges/mba-colleges-accepting-icet-india