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': 'Thickness of oxygen inhibition layer in composite curing is: \nSelect and explain. \nA. 1-50 micrometer, B. 15-150 micrometer, C. 50-500 micrometer, D. 1000-2000 micrometer', 'role': 'user'}, {'content': 'Answer: C \nExplanation: When composite is light cured, oxygen in the air causes an interference in the polymerization resulting in the formation of an oxygen inhibition layer on the surface of the composite.The oxygen-inhibited layer is the sticky, resin-rich uncured layer that is left on the surface.Thickness is about 50-500 micrometer.\nReference- Sturdevant 6th ed P:237', 'role': 'assistant'}]