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 areata is a/ an ? \nSelect and explain. \nA. Autoimmune disorder, B. Allergic disorder, C. Anaphylactic disorder, D. Bacterial infection', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Autoimmune disorder", 'role': 'assistant'}]