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': 'Quartz tungsten light cure device, minimum output of energy should not be less than \nSelect and explain. \nA. 300 mw/cm2, B. 350 mw/cm2, C. 400 mw/cm2, D. 450 mw/cm2', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]