This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Elbow injuries, Subject name: Orthopaedics
[{'content': 'Supracondylar fracture is usually caused by \nSelect and explain. \nA. Hyperflexion injury, B. Axial rotation, C. Extension injury, D. Hyperextension injury', 'role': 'user'}, {'content': 'Answer: D \nExplanation: supracondylar fracture of the humerus is the most serious fracture in childhood. Mechanism: The fracture is caused by a fall on an outstretched hand.As hand strikes the ground the elbow is forced into hyperextension resulting in fracture of humerus above the condyles. Ref: Essential Ohopaedics, Maheswari & Mhaskar, Edition 5, Page no: 97', 'role': 'assistant'}]