Interior Design

Both are good but interior designing is a more promising sector.

Hi Navpreet,
You may pursue MBA in Interior Designing. Kindly refer the link below :
http://goo.gl/5a27Ah
Hope this information helps. Please feel free to revert.
Wish you luck.

Yes, you may get into M.Des Interior designing. But to get into top institutes such as NID or NIFT, you will have to clear an entrance test. So start preparing for the same and appear for the exam in 2017.

Yes, you may apply for NID entrance exam 2017.

It is always advised to go for a degree course instead of diploma as the degree has more value in the industry. Get yourself enrolled in a private institute such as Pear Academy or Sir JJ Institute as to get into NIFT or NID you need to appear for entrance exams and for this year the examinations were held way back.

generally any degree holder eligible, search the same in google

Mahalaqa, If your creativity lies in making the interiors of a place appealing then certainly you should go for interior designing. You can go for M.Sc Interior designing where the eligibility is graduation (any discipline).
You can check the websites of some universities offering the course. Some universities offer good placements and placement assistance to students. Some even offer scholarships so as to make quality education affordable to all.
Good luck.