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: Dental
[{'content': 'A 12-year-old child comes to your office with a history\nof long-term use of tetracycline. The anterior teeth are a mild yellowish brown. What method would you use to remove the stain? \nSelect and explain. \nA. Hydrochloric acid pumice micro-abrasions, B. At home bleaching method, C. Superoxol with or without heat, D. Composite resin veneers', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]