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': 'The 37% hydrophosphoric acid typically dissolves about _____________ micrometer of enamel surface and creates a zone of etched enamel rods for about 15-25 micrometer \nSelect and explain. \nA. 5-10 microns, B. 1-5 microns, C. 10-15 microns, D. >15 microns', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]