Hello,

The main motto of an examiner or interviewer is to know the extent of your knowledge, so if you have a good concept clarity and have well prepared the ncert textbook, then you don't need any other book by your side, so be clear with concepts and key points, make proper notes for an easy and quick revision, and ncert will be enough for you to get prepared.
Hope this helps, all the best.

No book is enough for preparation. A candidate must start his/her preparation with NCERT Textbooks. As NCERTs have proper explanation and theory and problems to solve. Once done with the syllabus from NCERTs, you can move on to other books like IMU CET Complete Syllabus Theory Book (Revised and updated edition) by Subodh Juyal, IMU-CET 2020 Exam Guide etc. Preparing from these books will help you to understand what kind of questions are actually asked in the exam.