Diploma

Yes, you can go for Production design. After your B.Arch, it will be so beneficial for you to understand this field. It is basically Diploma programs followed by an entrance exam and a small interview.

Yes, part-time B.Tech is available in SRM for Diploma students.

Yes, you eligible for the post-graduation Diploma in Marine Engineering, and yes this course is good and have lots of opportunities further in career.
Good luck.

https://www.shiksha.com/arts-fine-visual-performing/photography/colleges/diploma-courses-india
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Degree in graphic design will be more beneficial, as you will get to learn more during 4 year professional course in graphic design.

Hi,
Yes, you are eligible for the course.
https://www.shiksha.com/medicine-health-sciences/paramedical/course/post-graduate-diploma-in-perfusion-technology-apollo-institute-of-hospital-management-and-allied-sciences-ayanambakkam-chennai-175707

Hi Amol,
Please find the link below for detailed information:
https://www.shiksha.com/medicine-health-sciences/paramedical/course/post-graduate-diploma-in-perfusion-technology-apollo-institute-of-hospital-management-and-allied-sciences-ayanambakkam-chennai-175707

Candidate should pass qualifying exam with minimum 50% of marks and should appear in TANCET entrance test or AIEEE. Seats will be filled on basis of scores obtained and cut off criteria set by Anna University. Thanks.

I hope this link will help you
https://www.shiksha.com/engineering/colleges/diploma-electrical-engineering-colleges-india.