This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy of skin, Subject name: Dental
[{'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: Alopecia areata is a non scarring inflammatory condition characterized by patchy hair loss Ref Harrison20th edition pg 1208', 'role': 'assistant'}]