The correct answer is: d) All of the above.
Kamrupi, Goalpariya, and Upper Assamese are all major dialects of Assamese. Kamrupi is the most widely spoken dialect, followed by Goalpariya and Upper Assamese. Kamrupi is spoken in the central and southern parts of Assam, Goalpariya is spoken in the western part of Assam, and Upper Assamese is spoken in the northern part of Assam.
Kamrupi is the oldest dialect of Assamese and is considered to be the standard dialect. It is the dialect that is used in literature, education, and government. Goalpariya is a more recent dialect that is spoken in the western part of Assam. It is similar to Kamrupi, but it has some unique features. Upper Assamese is the dialect that is spoken in the northern part of Assam. It is the most different from the other two dialects, but it is still mutually intelligible with them.
All three dialects of Assamese are rich in literature and culture. They have their own unique features and traditions.