Degree

You need to be passed in 12th with minimum 50% marks with Chemistry, Mathematics, Physics, Biology as mandatory subjects. You also need to clear OUCET entrance exam to get admission on the college.

The eligibility is that the candidate must have completed 10+2 from a recognized board. As per the college website, there is no age criteria. For more information, click below:
http://www.inifdthane.com/fashion_design

Hi,
Depends on how strict the university is with it's evaluation. What a Ph.D applicant requires is excellent research skills, some great recommendation letters and you must be good with networking. Share your profile details and research topics and interests with university supervisors, see who can recommend you. Email universities for your degree assessment and eligibility. It is best you communicate with universities directly.

Hi,
You can find the admission process here http://www.nalandaopenuniversity.com/admission.html

Diploma in Event Management is a part time UG Diploma, Part Time classroom course for a duration of 11 months. Interested candidates can apply directly to the college.

Yes, she is eligible for this course.
You can check the list of various colleges providing this course in India.
https://www.shiksha.com/animation/colleges/m-sc-colleges-india

MBA has a wider scope like-
1) Finance
2) Marketing
3) Human Resource
4) Information Technology
5) Operations
You can choose any one according to your interest.

You need to go to your college and ask this question because they may have various terms and conditions for re examination of student.

No, you cannot do that because universities track you from you attendance and examination you perform which is mandatory to get your degree.