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': 'Which one of the following is not a wound closure technique? \nSelect and explain. \nA. Partial thickness skin graft, B. Composite graft, C. Vascular graft, D. Musculo-cutaneous graft', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]