CMAT

Refer to the link given below-
https://www.shiksha.com/mba/colleges/mba-colleges-Gujarat

CMAT percentile between 80 percent to 85 percent can be safe for MNIT. So, your chances are very less.

They both are good colleges. With your score, you should try and apply at both colleges, then decide the college you wish to join after thorough research on their academic records and placements opportunities.

Check the following site - https://www.shiksha.com/mba/colleges/mba-colleges-hyderabad.

Yes, you are eligible for MSU marketing, MBA.

You can give MAH CET or GMAT for JBIMS.

There are some colleges that take direct admissions. You need to check upon the admission process of the college you are targeting.

Dear aspirant
It's great connecting with you. Based on previous year cut-offs, I am providing you information regarding the colleges you have chances of getting seat. I am mentioning the list of good colleges, you have chances of getting seat with CMAT score of 155. But cut-offs may increase, decrease or may remain same this year.-Institute of Management Technology (IMT), Nagpur
-Acharya Bangalore Business School (ABBS), Bangalore
-National Institute of Agricultural Marketing, Jaipur
-IES Management College and Research Centre, Mumbai.

Yes, Diploma students can appear for these exams.

Yes, you can pursue a regular and correpsondence degree together from different Universities in India. I will suggest you University School of Business (USB), Chandigarh University ranked among the Best Management Colleges in Punjab has earned recognition for its unique style of teaching & experiential learning. The attribute that makes learning business management exclusive at USB is its specialised approach paired with a research focus, innovation culture and entrepreneurship zeal backed by world-class facilities.