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 is the uses of Lasers \nSelect and explain. \nA. Oximetry, B. Laser Doppler flowmetry, C. Photoactivated disinfection, D. All of the following', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]