This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Radiology
[{'content': "Diffusion-weighted imaging typically shows bright signal suggestive of diffusion restriction in all the following except \nSelect and explain. \nA. CNS lymphoma, B. Alzheimer's disease, C. MCA territory infarct, D. Brain abscess", 'role': 'user'}, {'content': 'Answer: B \nExplanation: .', 'role': 'assistant'}]