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
Wavelength of Nd: YAG laser 
Select and explain. 
A. 1040 nm, B. 1040 mm, C. 1064 cm, D. 1064 nm
D: 1064 nm
Answer: D: 1064 nm 
Explanation: Ans. (d) 1064 nmRef: Khurana 6/e, p. 461Wavelength of laser is measured in nm and Nd:YAG Laser is 1064 nm. Nd:YAG Laser is used for posterior capsulotomy and peripheral iridotomy.