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': 'Phlegmon is a \nSelect and explain. \nA. Sexually transmitted disease, B. Type of celtulites, C. Type of osteomyelitis, D. Venereal disease', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]