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: Pathology
[{'content': 'It is a type of nerve cell that protects CNS from infection and become phagocytic in response to inflammation \nSelect and explain. \nA. Schwann cells, B. Ependymal cells, C. Microglia, D. Astrocytes', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C:\xa0Microglia\xa0helps remove bacteria and cell debris from the CNS.\nA:\xa0Schwann cells\xa0form myelin sheaths around axons, or enclose unmyelinated axons in the peripheral nervous system.\nB:\xa0Ependymal cells\xa0line ventricles of the brain,\xa0circulate cerebrospinal fluid; some form choroid plexuses, which produce CSF.\nD:\xa0Astrocytes\xa0serves as the major supporting tissue in the CNS and\xa0contribute to the blood-brain barrier.', 'role': 'assistant'}]