Hi DeepankarMiglani,
First off, a 750/Q51 is an outstanding score (it's right around the 99th percentile overall), so you should apply to any Business Schools that interest you. You're ultimately asking Admissions questions though, so you would likely find it beneficial to speak with an Admissions Expert about your overall profile. There's a Forum full of them here:
ask-admission-consultants-124/There are a variety of factors that go into selecting the Schools that you'll apply to. Here are some things to think about:
1) Is there a particular company that you want to work for or industry that you want to work in? Certain degrees are more appropriate than others if you have a specific career goal.
2) What do you want your MBA to do for you?
3) Do you want to go to School full-time or part-time?
4) Are you willing to relocate? Are you comfortable with working through a program that is primarily online?
5) Are you going to be applying for scholarships?
Etc.
It's okay if you don't have answers to any of these questions just yet, but since applying to (and ultimately attending) Business School requires a great deal of time, money and effort on your part, you really need to define as many variables as possible so that you can research the Schools that best match your goals.
GMAT assassins aren't born, they're made,
Rich