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': 'Proliferation of mature fibroblasts occurs in \nSelect and explain. \nA. Keloid, B. Hypertrophic scar, C. Both of the above, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Hypertrophic scar - Proliferation of mature fibroblasts keloid - Proliferation of immature fibroblasts.', 'role': 'assistant'}]