Hello Bushra,

The Common Admission Test scores a candidate on the bases of Quantitative Ability , Verbal Ability, Reading Comprehension, Data Interpretation and Logical Reasoning. In the earlier years,The Quantitative Ability and Verbal & Reading Comprehension sections consisted 34 questions each, whereas the Data Interpretation & Logical Reasoning section had 32 questions. Since, there are a lot of study material for a student to get the required knowledge, they often get confused in making the best decisions. For that purpose, I have compiled a list of subject wise books for you to refer to. Some of these are-

1. Arun Sharma's "How to prepare for Quantitative Ability for CAT".

2. Word Power Made Easy by Normal Lewis

3. How to Prepare for Data Interpretation & Logical Reasoning for CAT  by Arun Sharma 

For further information about other study materials, exam pattern etc, you can check out the link given below by Careers360. Good Luck!

https://bschool.careers360.com/articles/best-books-for-cat-preparation