This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
LASER that can be used in treatment of ureteric calculi 
Select and explain. 
A. CO2 laser, B. Nd-Yag, C. Holmium, D. All of the above
C: Holmium
Answer: C: Holmium 
Explanation: None