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: Orthopaedics
Not True about perthe's disease 
Select and explain. 
A. Femoral valgus derotation osteotomy, B. Chiari osteotomy, C. Coxa plana, D. More common in females
A: Femoral valgus derotation osteotomy
Answer: A: Femoral valgus derotation osteotomy 
Explanation: None