This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lens, Subject name: Ophthalmology
[{'content': 'Posterior capsule opacities are treated by - \nSelect and explain. \nA. Argon green laser, B. Lens explantation, C. Nd:YAG Laser, D. Diode laser', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Nd:YAG Laser is used for treatment of posterior capsular opacities commonly seen after cataract surgeries (after cataract). (Ref: Khurana 7th/e p. 483 & 4th/e p.202; Parson 22nd/e p.608 & 21st/e p.583)', 'role': 'assistant'}]