Hi Anu -
Congratulations on taking the first steps to pursue your MBA (taking your GMAT). This is a career-changing, and often life-changing, decision!
While your question is a valid one, there's just no way for anyone here to give you a solid answer. I suggest you start doing your research on 1 year programs, find a few that interest you, and then return to the forum with your questions. That's the most effective use of your time.
15 Years as Director of MBA Admissions - Now Working For the Applicants as the MBA Admissions Coach
Wendy Flynn is the MBA Admissions Coach, providing comprehensive MBA admissions consulting services. As the former Director of MBA Admissions for 15 years at a top-30 MBA pgoram, Wendy holds deep expertise in admissions issues for Full-Time, Executive and Professional (Part-Time) MBA Programs. Through her blog, MBA Expert Insights, she brings the view of the Director of MBA admissions to MBA applicants and others.
MBA Expert Insights Blog: http://www.mbaadmissionscoach.com/blog/
Member of the AIGAC, Association of International Graduate Admissions Counselors