<prompt> Which of the following lasers is used for treatment of benign prostatic hyperplasia as well as urinary calculi?CO2 laserExcimer laserHo: YAG laserNd: YAG laser  <response>: The holmium: YAG Laser is excellent for stone fragmentation and tissue ablation and is now the most popular system in use. - Smiths Urology Both Ho: YAG Nd: YAG laser systems can be used for BPH, but only Ho:YAG is used for stone fragmentation. For BPH, Ho:YAG is preferred over Nd:YAG. Ref : Cambells Urology 8e p3393 