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
Best procedure to be done after an injury to leg associated with exposure of underlying bone and skin loss ? 
Select and explain. 
A. Pedicle flap, B. Split skin grafting, C. Full thickness grafting, D. Skin flap
A: Pedicle flap
Answer: A: Pedicle flap 
Explanation: Ans is 'a' ie pedicle flap