This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Medicine
[{'content': "Senile plaques in Alzeihmer's diseasae are rich in- \nSelect and explain. \nA. Amyloid, B. Tau protein, C. ApoE, D. Neuroglia", 'role': 'user'}, {'content': 'Answer: A \nExplanation: *Pathology: neuritic plaques composed in pa of Ab amyloid, derived from amyloid precursor protein (APP); neurofibrillary tangles composed of abnormally phosphorylated tau protein. Ref Harrison20th edition pg 2567', 'role': 'assistant'}]