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': 'Which of the following is NOT a feature of keloids? \nSelect and explain. \nA. Never gets worse after 6 months, B. Severe itching is present, C. Margins are tender, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]