hi,

see first of all you need to complete your graduation course with atleast 50Z% marks in graduation., the more you get, it becomes good, then you need to appear in mba entrance test like cat/mat/xat/cmat etc. to get a good score you need to practice aptitude questions, like quantitative, verbal and logical reasoning, english grammers, comprehension etc. you may follow the below link to know about past years sample papers of entrance test, top bschools of india and other necessary things,

https://bschool.careers360.com/