This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuroradiology, Subject name: Radiology
[{'content': 'Dawson Fingers are feature of \nSelect and explain. \nA. Parkinsonism, B. Multiple Sclerosis, C. Progressive supra nuclear palsy, D. CJD', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Multiple sclerosis :- - is m/c immune mediated inflammatory demyelinating disease of CNS - autoimmune destruction of myelin formed - Dawson fingers - are radiological feature of Multiple sclerosis - are periventricular white matter hyperintensities perpendicular to ventricles - involvement of calloso-septal interface - open ring/ horseshoe enhancement is suggestive of demyelination', 'role': 'assistant'}]