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: Skin
[{'content': 'Alopecia aerata is: \nSelect and explain. \nA. Cicatricial scar, B. Non cicatricial scar, C. Fungal infection, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B. i.e. Non Cicatrial', 'role': 'assistant'}]