This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Ophthalmology
[{'content': 'For laser iridotomy which laser is used? \nSelect and explain. \nA. Argon laser, B. Nd YAG laser, C. Excimer laser, D. Co2 Laser', 'role': 'user'}, {'content': 'Answer: B \nExplanation: TYPE EFFACTS CLINICAL USE ARGON LASER PHOTOCOAGULATION DR ND YAG LASER (1064 nm) PHOTODISRUPTION CAPSULOTOMY, IRIDOTOMY EXCIMER (193NM) PHOTOABLATION LASIK , PHOTOTHERAPEUTIC KERATCTOMY CO2 LASER - USE IN OCULOPLASTY', 'role': 'assistant'}]