Hey as per my idea preparing for CAT exam for MBA is good choice as it will help you in choosing good and best college for MBA

Eligibility
Candidate should be graduate from recognised university
Final year candidate can also apply

Syllabus
Quantitative aptitude
English language
Reasoning

Selection criteria
CAT exam
Group discussion
Interview
Essay writing

Ways to do well in CAT exam
Rather than focusing on all the topics, students need to try and select those topics with which they are more comfortable
In order to ace CAT, students should look at questions from previous years' CATs and understand its syllabus.
CAT aspirants should always start early in preparing for the exams as an early start would benefit them in gaining knowledge about the kind of questions
One thing that is must while preparing for CAT is to practice on calculations rigorously on an everyday basis
Maintain your time and speed
Practice section wise