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': 'Not true about enchondroma \nSelect and explain. \nA. Associated with maffucci syndrome, B. Malignant transformation to chondrosarcoma, C. Painful condition, D. Treated with extended currettage', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Enchondromas are usually asymptomatic.', 'role': 'assistant'}]