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
Which of the following graft is commonly used to replace defective mandibular condyles in children: 
Select and explain. 
A. Costochondral graft., B. Sternoclavicular graft., C. Calvarial graft., D. Metatarsal graft.
A: Costochondral graft.
Answer: A: Costochondral graft. 
Explanation: None