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: Microbiology
[{'content': 'Listeria resists phagocytosis in phagosomes (phagolysosomes) due to: \nSelect and explain. \nA. b-hemolysin, B. Caspases, C. Cell membrane adhesion molecules, D. Opacity associated protein (OAP)', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is. 'a' i. e., b-hemolysin", 'role': 'assistant'}]