Dear Student ,

Your question seems quite incomplete to answer properly. Well, OT can refer to Operational Theatre Technology as well as Occupational Therapy. So, it would be better for me if you share your graduation course details more briefly and your choice of topic in M.Sc too.

Well, you can opt for IGNOU for correspondence M.Sc courses  of your desired subject( Topic should be between the available courses in IGNOU or any other open University )

To know more about M.Sc courses , refer to this link:

https://www.careers360.com/courses/msc-master-of-science

Hope this answer helps !