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
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