Business Management Studies

Since you already possess more than 6 years, I would suggest you get into an Executive MBA program since it will help you take your career to the next level. Though you can also do normal MBA, that wouldn't do much good when compared to Executive MBA's.
One of the eligibility criteria for getting into Executive MBA is that you should have at least 3 years of working experience. Since you have already cleared that criterion, you can go forward and start applying for Executive MBA programs.
While applying for institutes, make sure you do some background research on institutes and check out information such as accreditation, certificates and other things just to be on the safer side.
Once you apply, you will have to attend entrance exams and pass them to get a seat.
Here is a list of entrance exams :
GMAR
GRE
CAT
XAT
MAT
SNAP
FMS
ATMA AIMS
MAH-CET
JMET
IGNOU OPENMAT
IBSAT
Here is a list of some of the institutes.
GITAM University
Faculty of Management Studies (FMS) Delhi
Indian Institute of Foreign Trade (IIFT) New Delhi
Indian Institute of Management- Ahmadabad (IIMA)
Indian Institute of Management- Bangalore (IIMB)
Indian Institute of Management- Calcutta (IIMC)
Indian Institute of Management- Indore (IIMIDR)
Indian Institute of Management- Kozhikode (IIMK)
Indian Institute of Management- Lucknow (IIML)
Indian School of Business (ISB)
Symbiosis International University, Pune
Xavier School of Management (XLRI) Jamshedpur
You can check out this blog post which has some detailed information about admission procedures and entrance exams https://campushunt.in/blog/best-executive-mba-collegesin-bangalore/

Hello Samiksha,
The telephonic round is usually the first elimination round and is very basic in nature. Through this, the recruiter judges the confidence, communication skills and your thought processes. The questions can vary but the telephonic interview normally includes 'How are you? ', 'Tell me something about yourself', why this institute? , why should we choose you? , strength and weakness, educational background, family background, etc. You can do wonders if you are confident and make sense to the recruiter. For the telephonic round, a date or time slot or both will be allotted to you by the authorities and you will receive a call. Make sure that you are at a quiet place while appearing for the interview and your voice should be clear. Do not keep speaking but also listen to the questions properly, stop when the recruiter starts speaking. The perks of having a telephonic round is that the person cannot see you, hence, you can use a cheat sheet (a paper with relevant written information) in front of you. I hope you find this information useful.