Hello,
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Everything is alright,but to get admissions in top B-schools you need to clear entrance exams like CAT,MAT etc.,
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Some of the private institutions have there own entrance exams like,SNAP, XAT etc.,
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If you don't want to attempt any of these exams you even have MBA colleges without any entrance exams, but they doesn't come under top B-schools.
They are Just normal institutions.
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If you want to get admission in top B-schools you should be definitely writing any of the mentioned entrance exams, and you should score above 85%.
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Unless you possess these eligibility you are not allowed to get admission in B-schools.Hope this was cleared