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': 'Neuroglia responsible for phagocytosis is - \nSelect and explain. \nA. Fibrous Astrocytes, B. Protoplasmic Astrocytes, C. Oligodendrocytes, D. Microglia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Microglial cells are the major phagocytic cells in C.N.S. At the time of injury microglial cells modify to form macrophages called Gitter cells.\nOligodendrocytes\xa0\xa0→\xa0They secrete myelin sheath in CNS\nSchwann cells\xa0\xa0\xa0\xa0→\xa0 They secrete myelin sheath in the peripheral nervous system.', 'role': 'assistant'}]