Hello Harsh,

Don't worry about your internal marks, they don't have much weightage. You can convince them if you achieve good percentile in the final exam. A J-Curve is always appreciated. If you get 95 percentile in CAT, maybe you will have a J-Curve in you academic performance. Having a good score in CAT, you can apply to as many colleges as you want, maybe somewhere they won't value your academics much. During company placements too, if you have a good CAT score, you can proove your IMPROOVING graph rather than low score in academics.

Therefore I suggest you to go for MBA, and give CAT with full preparation.

Hope this helps