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
Congenital Coxa yarn is treated by - 
Select and explain. 
A. Fixation by SP Nail, B. Osteotomy, C. Bone grafting, D. Traction
B: Osteotomy
Answer: B: Osteotomy 
Explanation: Treatment is by a subtrochanteric corrective osteotomy.