Hi Rahul, There are a number of coaching institutes in India who coach students for GRE and GMAT. If you are interested in pursuing MBA abroad, you need to score well in GMAT. A GMAT score of 700+ is safe to apply to almost all the top B schools.

A few of the coaching institutes are:

The Princeton Review, TIME, Jamboree, Career Launcher,MJ GMAT Insight Deciding which is the best will be a very personal choice depending on a number of factors like location, batch timing, person teaching etc.