Hello

Hope you are doing good. I think you have good marks in your academics with marks 80% almost everywhere. But for the admission in top B schools you need to perform well in the entrance exam as well as in the interview

TOP B SCHOOLS IN India are:

• IIM Ahmedabad - Indian Institute of Management
• IIM Bangalore - Indian Institute of Management, Karnataka
• Indian Institute of Management, Calcutta
• IIM Indore - Indian Institute of Management
• IIM Kozhikode - Indian Institute of Management

you can get more information from here : https://bschool.careers360.com/colleges/ranking

Good luck.