not getting how to solve varc more accurately

everyone is facing this problem, including me
so, just keep practicing more and focus on improving your vocab
so, that you can understand the passages better.

watch amit rohra sir on youtube

Try to use techniques for solving rather than selecting what seems right. There is a technique called B.E.A.S.T. Search it on YouTube, follow the rules mentioned, and apply it consistently, and you'll see a steep rise in your accuracy.

I think you should focus your reading skill by going through newspaper articles everyday. It will help you build confidence during reading an RC passage.