Ok. Here are my 2 cents.
QUANT:
Being an Indian, you should score atleast 45+ in Quant. Sorry to say but 37 is poor. When i gave my 1st mock diagnostic test without any prep, I got 460 with Q40. Even if you get 15 questions wrong in Quant, you will get 46 or 47. What you need to do? Answer is get
MGMAT maths books and solve each and every problem from it. Once you are done with it thoroughly, you will score 45+ for sure.
VERBAL:
Yes we Indians arent that good at Verbal. SC are the easiest to improve on, then CR and lastly RC. What you need to do?
Go through
MGMAT SC book for SC. For CR, read Powerscore Bible. For RC, nothing can work except practise and reading novels.
Also, go thorugh Bunuels signature collection for more harder problems in quant once you get your basics clear. There are definitely schools which will accept you with 460 score also. But they are way below average. Just going abroad shouldnt be your priority. Work harder and get 650 atleast and apply for top 40-50 schools.
I hope it should work.