Greetings,

Rakeeb as you already know that the MAT syllabus consists of 5 sections which are : 

                                             Number of questions : 

Language Comprehension :                        40 

Intelligence and Critical Reasoning :           40 

Indian and Global Environment :                 40 

Data Analysis and Sufficiency :                    40 

 Mathematical Skills :                                  40 

So for the preparation of MAT here are some suggestions that you should take into consideration : 

Take help from previous years paper of various other entrance exams like CLAT , SSC, CAT , CMAT, IBPS, NDA , NIFT ,NID AILET ,MAT,GMAT, XAT etc. ( you will find a bundle of questions that you can practice daily) . Your main focus should be to find and analyse logical reasoning ,English , quantitative section from these papers . 

A constant regularity should be maintained for ENGLISH SECTION  ;read editorials from Indian Express or The Hindu; make a notebook for difficult vocabulary and find their meaning everyday ; try solving error correction from various entrance exams mentioned above . You will find their previous year papers on various sites  ( try SSC previous year papers because they have the most number  of  papers in a year and are easily available online ). If you are finding it difficult to score in  grammar you can go through the concept from books of English of someone who is studying in school .It will help you because of the kind of detailing that will provided  in that book.   

To  score in MATHEMATICAL SKILLS   first try clearing  your doubts and take help of RD or RS Sharma of 9th and 10th standard, try Google Books or Pdf's of specific book. There are many quantitative reasoning books in Google Books with solutions  if you do not want to buy books. Try You tube videos for difficult concept . 

For DATA ANALYSIS AND SUFFICIENCY   SSC papers which have got loads of good questions from this section ,  purchase How to Prepare for Data Interpretation by Arun Sharma or Accredited Guide to Data Interpretation and Data Sufficiency by Ananta Ashisha 

 For CRITICAL REASONING purchase  Competitive reasoning by PratiyogitaKiran; Modern Approach to logical reasoning by RS Sharma . 

For INDIAN AND GLOBAL ENVIRONMENT   try Competition In Focus magazine's weekly edition and download 1 or 2 general awareness app ; you can also subscribe  You tube channel of weekly or daily updates for general knowledge of some good newspaper site (The Hindu , Indian Express , DNA etc) , in this way you will find it inters  and it would be easy for you to remember . Try gktoday or any online website . 

If you want to buy one single book for the preparation of all the 5 sections then you can go for DISHA 'S COMPLETE GUIDE FOR MAT or ARIHANT FACE TO FACE MAT

But I would suggest that you practice section by section from the methods suggested above ,It will benefit you more .But the benefit these books provide is that they also have past year solved papers which will be beneficial  . 

I hope this article might have helped you resolve all of your queries mentioned and if not then do drop a comment I will be delighted to help you out.

Hello Rakeeb

Their is no one book that is best for the syllabus and preparation of MAT exam. I'll name a few and you may go and check yourself as to which will be easy for you to understand.

Mission MBA MAT Guide: BS Sijwali and Tarun Goyal

Complete Guide for MAT and Other MBA Entrance Exams: Deepak Agarwal

10 Challengers MAT: Dharmendra Mittal

Study Package for MAT: Arun Sharma

MAT (Management Aptitude Test) Entrance Exam Guide: R. Gupta

for more details on exam and pattern: https://bschool.careers360.com/articles/mat-exam-pattern