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: Surgery
[{'content': 'Keloid scars: \nSelect and explain. \nA. Usually occur in the Caucasian race, B. Often occur in wounds which have healed perfectly without complications, C. Surgical treatment as a single modality has the least recurrence, D. Radiation should not be administered as it is a non¬malignant condition', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]