Interior Design

Go through the syllabus or content of these options and the one which will suit you the most in achieving your goal, select that option.

Yes, you can apply for the exam.

Yes, you are eligible to do PG course in interior & exterior design.

That's difficult to say. Many students study at unrecognised colleges for which government has no records.

https://www.shiksha.com/design/interior-design/colleges/colleges-Vadodara
Refer this link, hope it helps.

Yes, you can. Unless otherwise mentioned by the university.

While selecting the best institute, you need to check some of the important parameters such as recognition, year of establishment, batch size, syllabus, faculty, fees, placements etc. For your reference, here's a list of some renowned fashion design institutes in India:
National Institute of Fashion