This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pediatric Ohopedics, Subject name: Orthopaedics
Congenital coxa vara is treated by: 
Select and explain. 
A. Fixation by SP Nail, B. Osteotomy, C. Bone grafting, D. Traction
B: Osteotomy
Answer: B: Osteotomy 
Explanation: CONGENITAL COXA VARA Clinical Presentation Painless limp in a child who has just staed walking Shoening-Limitation of abduction and internal rotation Radiological Reduced neck shaft angle (varus) Veical epiphysis plate Separate triangle of bone in infero-medial pa of metaphysis called as Fairbank's triangle Treatment depend upon HE angle if:- Angle 40o -60o = Observation >60o or if shoening is progressive = subtrochanteric osteotomy. Hilgenreiner's epiphyseal angle: angle between horizontal line joining center (triradiate cailage) of each hip (Hilgenreiner's line) and line parallel to physis; the normal angle is about 30 degrees.