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: Medicine
[{'content': "Localised regional cerebral atrophy is seen in - \nSelect and explain. \nA. Alzheimer's disease, B. Frontotemporal dementia, C. C.J. disease, D. Friedreich's ataxin", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]