MBA Entrance Exam

Some colleges do not need entrance score. They only see your academic performance in your UG courses. Few more colleges can be selected by you in personal interview and some colleges organise their own entrance test at college level.

5.3?
You can still apply in Alliance University but they will not consider your MAT marks. You will have to follow the whole procedure of following the Alliance Entrance Test and other rounds to get your admission in the University.

You may refer to these guidelines to calculate your percentile:
https://www.shiksha.com/business-management-studies/articles/how-mat-score-and-percentile-are-calculated-blogId-14481.

Yes, you are eligible for it. You just have to go through the admission process and a personal interview.

Based on your MAH-CET scores, the some of the best colleges you can get:
1. MAEER's MIT School of Management, Pune
2. Zagdu Singh Charitable Trust's Thakur Institute of Management Studies & Research, Mumbai
3. Rizvi Institute of Management Studies & Research, Mumbai
4. Vivekanand Education Society's Ins

Yes, it is possible! You have to score more than 210 marks in NMAT to get a call for GD-PI. But actually, it requires much higher score to convert the same.

Yes, You can start CAT's preparation.

Can you specify any name of college because the list of CET verify it every year. Are you looking for PGDM or MMS?

For PGDM from SIESCOM, you need to perform well in GDPI as your marks in CMAT are very poor. So, give your best in GDPI to increase your chances.
Best of luck.

For PGDM in SIES, they have the equal weightage for GDPI and entrance exam, so if you score well in your GD-PI then your entrance exam marks don't matter as such.
Best of luck.