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': 'After intracoronal bleaching immediate facial composite veneer is required, what should be done \nSelect and explain. \nA. Rinse with 3 % hydrogen peroxide and ultrasonics, B. Treat with catalase for 3 mins, C. Cannot be done at least for 7 days, D. Rinse with triple distilled water', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Catalse neutralizes residual H2O2 that interfers with composite bonding and polymerization.', 'role': 'assistant'}]