Hi Senthilkumar,
Firstly great work! You're clearly working hard for the exam and I'm sure that you'll crack it. Now just to be doubly sure

, instead of focussing on solving more questions, spend time in analysing the ones you are getting wrong. Classify the question by topic and do this exercise for a few mock papers (at least 3) and see if there are any patterns. Is there a particular topic you'll consistently scoring low in? Or is there a type of question (what next, ITTO, etc.) that you're consistently scoring low in? Once you have categorised the questions you're getting wrong by topic and nature of question, I'm sure the data would give you a lot of information on how to fix your mistakes and improve your scores even further. Once you've identified a particular topic you can go back to re-learning about that topic from multiple sources or if it's a particular type of question you seem to be consistently struggling with, ask us here and we can help!
Hope this helps. Good luck!