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
[{'content': 'Calcaneum is associated most commonly with which # - \nSelect and explain. \nA. # rib, B. # vertebrae, C. # skull, D. # fibula', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Most common mechanism of injury is fall from height, often from a ladder, onto one or both heels. The calcaneum is driven up against the talus and is split or crushed.\nAbout one fifth of these patients suffer associated injuries of the spine, pelvis or hip.', 'role': 'assistant'}]