You can go for IB. You should have cleared anyone entrance test (such as CAT/MAT/XAT/NMAT/CMAT/GMAT/

NEST ) accepted by various colleges and you should also have a minimum of 45% to 55% in your bachelors(any stream) for admission in the same. Admission in MBA is done via two modes- either through an entrance exam or direct admission which is based on a merit basis or management quota basis. Some good institutes are: IIMs

Xavier's Labour Relations Institute, Jamshedpur
Indian School of Business, Hyderabad,
Lovely Professional University, Punjab
K.J. Somaiya Institute of Management Studies and Research Mumbai
Lal Bahadur Shastri Institute of Management Delhi
Management Development Institute (MDI), Gurgaon
Narsee Monjee Institute of Management Studies, Mumbai

It depends on your choice and interest.
Finance,  Marketing and Hr are the best option in MBA.
The core courses in an MBA program cover various areas of business such as accounting, applied statistics, business communication, business ethics, business law, finance, managerial economics, management, entrepreneurship, marketing and operations in a manner most relevant to management analysis and strategy.

Thanks,
Azim