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: Ophthalmology
The laser used in LASIK is 
Select and explain. 
A. Argon diode laser, B. Nd:YAG Laser, C. Excimer laser, D. Double frequency Nd:YAG Laser
C: Excimer laser
Answer: C: Excimer laser 
Explanation: Answer- C. Excimer laserKrypton red Excimer ( argon fluoride)- Photorefractive keratectomy (PRK), phototherapeutic keratectomy (PTK), LASIK, LASEK