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': "Senile plaques in brain is a feature of \nSelect and explain. \nA. Multiple sclerosis, B. Parkinsonism, C. Alzheimer's disease, D. Wilson's disease", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]