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': 'Which of the following dyes is used for detection of enamel caries? \nSelect and explain. \nA. Acid red system, B. Zygo ZL-22, C. α - Aminoacridine, D. All the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: CARIES DETECTION DYES\n\xa0\nEnamel Caries: \n\n0.5% Basic fuschin\xa0\nZygo ZL-22\xa0\nFuschin\n\nDentinal Caries:\n\nAcid red system\xa0\nα - Aminoacridine', 'role': 'assistant'}]