I'm not getting anywhere when it comes to RC. how can I improve in this area in this short span of time

Reading Comprehension is one of the key areas in English. Once you master it, other areas like para jumbles, sentence completion, etc. fall into place. To improve your Reading Comprehension skills make it a habit to read newspapers regularly. After you read an article, make a short precise of important points in the article and the author's opinion. This kind of summary making improves your comprehension skills significantly.