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
For laser iridotomy which laser is used? 
Select and explain. 
A. Argon laser, B. Nd YAG laser, C. Excimer laser, D. Co2 Laser
B: Nd YAG laser
Answer: B: Nd YAG laser 
Explanation: 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