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': 'Best procedure to be done after an injury to leg associated with exposure of underlying bone and skin loss - \nSelect and explain. \nA. Pedicle flap, B. Split skin grafting, C. Full thickness grafting, D. Skin flap', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]