This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Central Nervous System), Subject name: Pathology
Phagocytosis in brain is caused by - 
Select and explain. 
A. Astrocytes, B. Microglia, C. Oligodendrocytes, D. Ependymal cells
B: Microglia
Answer: B: Microglia 
Explanation: Ans. is 'b' i.e., Microglia 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.Oligodendrocytes - They secrete myelin sheath in CNSSchwann cells - The secrete myelin sheath in peripheral nervous system.