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: ENT
[{'content': 'Which of the following Lasers is most commonly used in Laryngeal surgery? \nSelect and explain. \nA. Co2 laser, B. Nd YAG laser, C. Argon laser, D. KTP laser', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The Carbon dioxide (CO2) laser is one of the most powerful and efficient lasers available and is a commonly used device for laryngeal surgery. Its prime benefit is its precision as a surgical scalpel and lack of deep tissue penetration leading to lesser subsequent scarring.', 'role': 'assistant'}]