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 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 merit basis or management quota basis.
MBA Specialization, which are as follows:Oil and Gas Management 
Hospital and Healthcare Management, 
Supply Chain and Logistics, 
Tourism and Hospitality, 
Financial Markets, 
Finance, 
Marketing, 
Human Resources, 
Business ,Operations, 
Information Technology, 
Retail Management, 
Strategy, 
Entrepreneurship, 
Business Analytics, 
E-Commerce, 
Banking and Financial Services, 
Agri - Business Management.
Some good institutes are :IIMs

Dear Divi vamsi 

MBA is one of the hot courses in the world and lots of aspirant love this course not only because of it's job opportunities but also for the knowledge they learn from it

MBA stands for master of business administration and it has lots of variety in it like full time MBA part time distance MBA executive MBA etc 

Once you have completed your degree any one can join MBA with or without passing some entrance exams.like cat Cmat etc 

If you score better score in these entrance exms you can secure good admission in good college but about the fees it is too expensive than other courses 

Best of luck 

MBA is a Master of business  Administration.
For MBA,  U need to completed bachelor degree in any field .
After Completing,  U need to Attempt for the Entrance Exam Like CAT, CMAT, SNAP & XAT.
if u clear the Exam with good Marks.
Then u will get the interview call from top colleges like IIM.
MBA is Commonly for Students who look for higher studies or job in abroad or foreign countries.
MBA give u better career or growth in your field.
Thanks,
Azim