hi! after you complete mbbs course, which is a five year course that you do after successfully obtaining a good seat in the medical colleges via neet. Pursuing a post graduate degree in after mbbs can be done by opting for MD or MS. (these are the most popular options after mbbs). there are various disciplines in which one can pursue an md including dermatology, obstretics and gynaecology, surgery. Radiology is also one such field.

Msc on the other hand, is pursued after you complete bsc which does not require neet.

one major difference is that mbbs and md enables you to treat patients where as bsc,msc dont.