MBA Entrance Exam

With this score and academic background you are eligible for Christ University.

You can ask CAT related doubts on Shiksha Ask and Answer Platform. You will get the apt solution for your query.

Top MBA colleges in India accepting MAT scores are mentioned at the link provided below. This ranking is based on rankings published by The Week, Business Today and National Institutional Ranking Framework (MHRD).
https://www.shiksha.com/mba/ranking/top-mba-colleges-in-india-accepting-mat/2-2-0-0-306

Being honest, it's difficult because currently, Kirloskar has changed their admission criteria and as per you score it's difficult to get the admission.

If you are willing to get admission for MBA-Pharma Biotechnology and you are a home university student then you'll need more than 85 percentile in ATMA and for Other than Home University you'll need to score more than 90 percentile. If you If you wish to pursue MBA+ then ATMA score will not be considered from this year for MBA+ admission. Admission will be on the basis of MAH-CET and other national MBA entrance tests.

You can't do MBA after your 12th. You need a suitable degree before doing any Masters. So, check for colleges to do your BBA or engineering or any other management degree if possible.

MMS program is all depend on the ranking in ACAP round, but chances are there as your percentile is also good, and you belong to ND-OBC category.

Dear Rohit,
MAT, May 2018 score will not be accepted by Chetana's.

https://www.quora.com/How-did-99+-percentile-prepare-for-CAT
You can find tips regarding the preparation for CAT. You will have to purchase the model test papers as they aren't available online. You can go to Flipkart or Amazon and buy the complete book.

Percentile refers to the score that is allotted to an individual basis the performance of the total number of students appearing for the exam. Percentile is followed in all major competitive programs to rank students based on their performance in comparison to the others appearing for it.