This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
[{'content': "Focal bilateral thalamic, posterior internal capsule showing hyperdensity and calcification in CT scan and extensive involvement of deep white matter is characteristic of \nSelect and explain. \nA. Alexander's disease, B. Metachromatic leukodystrophy, C. Krabbe's disease, D. Multiple sclerosis", 'role': 'user'}, {'content': "Answer: C \nExplanation: Krabbe's disease (globoid leukodystrophy).\nOther features :\n\nHypodensity on T2 MRI.\nInvolve cerebellar white matter.", 'role': 'assistant'}]