CAT is an exam whose score is accepted by most of the universities across India. So CAT would be the perfect choice. You should also try CMAT and NMAT. Some colleges consider its score as well.
Also you should set a target college in Bangalore in your mind, and go through the selection procedure there and prepare accordingly.
For eg: You choose Christ, then yo should check the official website for the eligibility criteria for MBA. Then you should incline your preparation in a way to help you in securing Christ.
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