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: Surgery
[{'content': 'Negative pressure dressing is used for \nSelect and explain. \nA. Removal of eschar, B. Chronic non-healing diabetic ulcer, C. Unexplored fistulas, D. Untreated osteomyelitis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B. Chronic non-healing diabetic ulcerNegative-pressure wound therapy (NPWT) is a therapeutic technique using a vacuum dressing to promote healing in acute or chronic wounds and enhance healing ofsecond and third degree burns.Use in the treatment of diabetes-associated chronic leg wounds.', 'role': 'assistant'}]