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: Ophthalmology
[{'content': 'Which laser is used in the manage ment of after cataracts? \nSelect and explain. \nA. Argon, B. Krypton, C. Nd :YAG, D. Excimer', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Nd :YAG', 'role': 'assistant'}]