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': 'Pehes affects age group \nSelect and explain. \nA. < 4 yrs, B. 4 - 8 yrs, C. 10 - 25 yrs, D. > 25 yrs', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. B. 4 - 8 yrsPehe's disease is also known as osteochondritis deformans juvenilis or Coxa plana or Pseudocoxalgia.Pehe's disease is an osteochondritis of the epiphysis of the femoral head (capital femoral epiphysis).The disease occurs commonly in males in the age group of 5-10 years.", 'role': 'assistant'}]