Hi jigneshmaniyar,
Reading Comprehension on the GMAT falls into predictable patterns, so you CAN train to score at a higher level within that sub-category. While the length and subject-matter will vary from passage-to-passage, the Tactics for effectively dealing with RC don't change. You have to invest the necessary time/energy to properly read the prompt and take notes - and you have to do the necessary work to deal with the specific (and predictable) questions that are asked. You'll also find that most of the wrong answers that appear in RC questions fall into predictable patterns, so you can learn how to spot (and avoid) those wrong answers.
Before I can offer you the specific advice that you’re looking for, it would help if you could provide a bit more information on how you've been studying and your goals:
Studies:
1) How long have you studied?
2) What study materials have you used so far?
3) How have you scored on each of your CATs (including the Quant and Verbal Scaled Scores)?
Goals:
4) What is your goal score?
5) When are you planning to take the GMAT?
6) When are you planning to apply to Business School?
7) What Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich