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': 'Catalase positive coagulase negative beta hemolytic bacteria - \nSelect and explain. \nA. Strep pyogens, B. Staph aureus, C. Coagulase negative staph, D. Enterococci', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Staphylococci are catalase positive.', 'role': 'assistant'}]