This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
[{'content': 'All of the following statements about necrotizing fasciitis are true, except \nSelect and explain. \nA. Infection of fascia and subcutaneous tissue, B. Most commonly caused by Group A beta hemolytic streptococci, C. Most common site is perineum followed by trunk and extremities, D. Surgical debridement is mandatory', 'role': 'user'}, {'content': 'Answer: C \nExplanation: NSTIs (necrotizing soft tissue infections) can occur in any area of the body but are most commonly seen in the extremities, perineum, and genitalia, with fewer arising on the chest or the abdomen (extremities are more common) Fournier gangrene is a type of necrotizing fasciitis or gangrene affecting the perineum', 'role': 'assistant'}]