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: Pediatrics
[{'content': 'According to WHO clinical staging of HIV in children oral hairy leukoplakia belongs to which clinical stages? \nSelect and explain. \nA. Clinical stage 1, B. Clinical stage 2, C. Clinical stage 3, D. Clinical stage 4', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Oral hairy leukoplakia belongs to\xa0Clinical stage 3.', 'role': 'assistant'}]