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': 'Melton’s solution is \nSelect and explain. \nA. 0.5% NaOCl, B. 1% NaOCl, C. 1.5% NaOCl, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]