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': 'Food poisoning is seen with - \nSelect and explain. \nA. Staph aureus, B. Staph. epidermidis, C. Strep. pyogenes, D. Staph saprophyticus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]