Unfortunately Abhishek first of all 40 percentile is very very low. With this percentile, it will be very hard for you to end up in any good college. There might be some college which might give admission to you but those colleges are poor in faculty, infrastructure, placements etc. And it won't fetch you anything more than a namesake MBA degree.

Still, in order to solve your query, I would like to tell you that even Amity university require atleast above 70 percentile in order to further evaluate your application.

I would strongly recommend you to either work on your mistakes and sit in the MAT' Feb exam, get a good score to get admission in a good college or if you have a chance then take a whole year rest work on your basics and then next year crack CAT with a very good percentile.

Make a wise decision for your career. All the best!!

As such there are no good colleges that you can get into if you secured below 40 percentile. Amity, noida is a good college but the cutoff is high for that. I recommend you to appear for other exams like MHCET.