I have been solving at least one rc everyday from cracku, but my accuracy and score does not seem to increase. Please suggest what else should I do?

Hi Anish,
Solving an RC is good but what you should do is after solving every RC spend around 20-25 minutes in analyzing each and every question. Try to understand why you got the particular question wrong. Was it because you could not understand the passage or was it because you chose a wrong option. Go through the explanations provided and understand where you were wrong. Do this for 15 days and your performance in RC's will surely improve.
Thanks