This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Elbow injuries, Subject name: Orthopaedics
[{'content': "Osteochondritis of the epiphysis of the head of the femur is \nSelect and explain. \nA. Panner's disease, B. Kienbock's disease, C. Pehes' disease, D. Osgood Shlatter's disease", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Pehes&; disease, the osteochondritis of the epiphysis of the head of the femur is the commonest osteochondritis.Maheswari 5e pg: 318', 'role': 'assistant'}]