Yes, definitely you can take a year drop after you complete BBA degree and prepare well for CAT and CMAT. Along with this with good preparation, you can also give other MBA exams like XAT, MAT, SNAP, NMAT. All these exams also open up a list of good colleges for you to take admission.

Either you join coaching or do self-preparation make sure you clear all your basics and give lots of online mock tests which will help you in your preparation and improve your score. And this 1-year gap will not affect at all your selection procedure.

All the best for your preparations!!

Hello Shubhankar! Yes, you can definitely prepare for CAT as well as CMAT again and it won't be taken as a drop as you're in the final year. It will be counted in your graduation period. Go for it. All the best!