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 aerate is presumed to be: \nSelect and explain. \nA. Androgenic in nature, B. Autoimmune in etiology, C. Infective in etiology, D. Pa of lichenoid in spectrum', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B. i.e. Autoimmune in etiology', 'role': 'assistant'}]