This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Guillian Barre syndrome & Alzheimer's disease, Subject name: Medicine
[{'content': "Which of these cells is often malfunctioning in Alzheimer's disease? \nSelect and explain. \nA. Microglia, B. Radial glia, C. Dendrites, D. Oligodendrocytes", 'role': 'user'}, {'content': "Answer: A \nExplanation: Alzheimer's disease characterized by: * A ss amyloid deposition * Taupathy * Malfunctioning of microglial cells which play role in phagocytosis & security in brain. IOC - Functional MRI DOC - DONEPEZIL", 'role': 'assistant'}]