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': 'Enchondroma commonly arises from- \nSelect and explain. \nA. Ribs, B. Phalanges, C. Vertebra, D. Tibia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The phalanges\xa0are digital bones in the hands and feet of most vertebrates.\nIn primates, the thumbs and big toes have two phalanges while the other digits have three phalanges.\nThe phalanges are classed as long bones.', 'role': 'assistant'}]