This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Brain Imaging: Anatomy, Trauma, and Tumors, Subject name: Radiology
[{'content': "Dawson's fingers on MRI are diagnostic of - \nSelect and explain. \nA. Hyperparathyrodism, B. Psoriatic arthropathy, C. Multiple sclerosis, D. Multiple exostosis", 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Multiple sclerosis o Dawson fingers are a radiographic feature depicting demyelinating plaques through the corpus callosum, arranged at right angles along medullary veins (callososeptal location).o They are a relatively specific sign for multiple sclerosis (MS), which presents as T2 hyperintensities)", 'role': 'assistant'}]