This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Surgical Techniques for Cataract Extraction, Subject name: Ophthalmology
[{'content': 'Posterior capsular cataract is treated by which laser? \nSelect and explain. \nA. Argon laser, B. CO2 laser, C. Excimer, D. Nd YAG', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (d) Nd YAGRef: Khurana 4/ey p 431', 'role': 'assistant'}]