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': 'True about keloid scar is \nSelect and explain. \nA. Non-familial, common in children, males affected, B. Non-familial, does not outgrow the margin, blacks are affected., C. Familial, females are affected, outgrows the margins, D. Familial, men affected, whites affected more', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]