This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Injuries Around Arm & Elbow, Subject name: Orthopaedics
[{'content': 'Malunion of the supracondylar fracture of the humerus in children results \nSelect and explain. \nA. Flexion deformity, B. Extension deformity, C. Cubitus varus deformity, D. Cubitus valgus deformity', 'role': 'user'}, {'content': "Answer: C \nExplanation: (Cubitus varus deformity) (599-Apley's 8th)* Malunion is the commonest complication of a supra condylar fracture and results in a cubitus varus deformity (Gun-stock deformity)* This is because the fracture unites with the distal fragment tilted medially and in internal rotation* Cubitus valgus deformity results from fracture lateral condyle of humerus. This may result in late ulnar nerve palsy (Tardy-ulnar nerve palsy)", 'role': 'assistant'}]