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: Orthopaedics
[{'content': 'Choose the wrong statement about osteomyelitis \nSelect and explain. \nA. Sickle cell anemia - Salmonella, B. HIV - Staph aureus, C. Post surgical - Pseudomonas aeruginosa, D. Diabetic Ulcer - Anaerobes', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]