Hi ankitasahay14,
To start, a 610 is a strong initial CAT score (the average score on the Official GMAT hovers around 540-550 most years). Many Test Takers spend 3 months (or more) of consistent study before they hit their 'peak' scores though, so you might end up needing more study time than you've allotted.
Before I can offer the pointed advice that you're looking for, I'd like to know a bit more about your studies so far and your timeline/goals:
1) Have you done any studying so far or have you just taken this one CAT?
2) What were the Quant and Verbal Scaled Scores on this CAT?
3) Do you have any practice materials yet?
4) When are you planning to apply to Business School?
5) Do you know which Schools you plan to apply to?
GMAT assassins aren't born, they're made,
Rich