Aakanksha, MBA is a post graduation program. So to be eligible for MBA, you need to have a Graduation in any discipline with a minimum aggregate of 50%. It is 50% for General Category and 45% for Reserved Categories. But there is IPMAT which is an entrance examination for admission to 5 year Integrated MBA program which is for 5 years. It is delivered by IIM Indore. So right after your 12th, you can appear for IPMAT and after 5 years you graduate with an Integrated degree. Or if you want to study Bachelors and then opt for Master's degree, you can select any discipline to complete your Bachelors.