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 represents an appropriate management of Pehe's disease in a young patient? 
Select and explain. 
A. Total hip replacement, B. Exercise, C. High dose calcium, D. Making sure that the femoral head remains in the acetabulum
D: Making sure that the femoral head remains in the acetabulum
Answer: D: Making sure that the femoral head remains in the acetabulum 
Explanation: Here the aim is to prevent injury to the femoral head while it is soft. If the head remains in the acetabulum it will gradually revascularise.