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': 'A 14 year old female patient complains of decayed teeth. Intra-oral examination reveals restoration of occlusal caries with composite restoration. Which of the following lasers is used for curing of this restorative material? \nSelect and explain. \nA. Argon, B. CO2, C. Nd:YAG, D. Excimers', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]