Sir..in my Mock I haven't score very well in VA/RC so what I can do for doing better so after my cuttoff will be clear in this section..!

Good score in VA/RC comes from reading habit, which most of us don't have. In a short span of time, it is difficult to improve as it's a long process. But you can try reading from all sources and of all types, like Newspapers, magazines, articles, novels etc. Try to grasp the context and grammar usage. Ultimately it's all about practice and there is no shortcut in VA/RC accuracy.