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': 'What is true about keloids - \nSelect and explain. \nA. It appears immediately after surgery, B. It appears a few days after surgery, C. It is limited in its distribution, D. It is common in old people', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., It appears a few days after surgery", 'role': 'assistant'}]