NIT Eligibility

Yes, you have a good score you can get any good NIT.

Yes, you can get any NIT in this score.

Well, in my opinion, any NIT or IITs are not a good option to do an MBA. I would suggest you that since your scores are pretty good, you should target top tier B schools. For more information you can check authentic ranking websites for checking which all NITs are good according to your choice of specialisation and then also check those particular NIT s website. There are many NIT offering MBA but again I would suggest you to look for better B schools which only provide management education.

You have to score about 200 marks to get a good NIT via JEE exams.

Hi, score of 200-220 marks out of 390 marks in JEE Main Paper 2 will get you chance in NIT's.

For admission in NIT, candidate must appear for JEE Mains. Unless you appear for the entrance exam you won't get admission in National Institute of Technology. The eligibility criteria for entrance exam is 12th with PCM as the subjects.
Apart from IIT and NIT, most colleges in India offer lateral entry for diploma students. These colleges do reserve some seats for lateral entry students.Diploma holders are not allowed for JEE Main admissions but they are allowed for JEE Advanced. So they can write the JEE Main exam just to qualify for JEE Advanced.

Hello!
None of the NITs accept NMAT scores for their MBA programmes. http://www.nmat.org.in/test-takers/nmat-by-gmac-accepting-institutions/ Kindly visit this link to know about the B-schools accepting NMAT scores.

Hello, Kindly go through the link:
https://www.google.co.in/url?sa=t&source=web&rct=j&url=https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor&ved=2ahUKEwihrdTd2-HcAhWWbisKHR1xDvUQFjAAegQIBxAB&usg=AOvVaw1N9BzFtyUCP4JU-2UQHQ0H.

The announcement by MHRD, the revised criteria of 75% marks (Gen Category), 65% (SC/ST/PwD Category) or being in the top 20 percentile in class XII is likely to be applicable for admissions to all NITs/IIITs/GFTIs along with IITs from the admission year 2017-18 onwards.