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': 'Function of hepatic kupffer cells is: \nSelect and explain. \nA. Formation of sinusoids, B. Vitamin-A storage, C. Increases blood perfusion, D. Phagocytosis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]