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': 'Free skin graft is rejected on ? \nSelect and explain. \nA. Muscle, B. Fat, C. Deep fascia, D. None', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'None'", 'role': 'assistant'}]