Which prep solution is contraindicated for use with a laser?

The correct choice for the prep solution that is contraindicated for use with a laser is Duraprep. This solution contains alcohol, which is highly flammable and can ignite when exposed to laser energy. When lasers are utilized in surgical procedures, the presence of flammable substances poses a significant risk of fire, particularly in the surgical field.

In contrast, the other options, such as iodophors, Hibiclens, and triclosan, do not have the same flammable characteristics when used appropriately. While it's essential to consider the safety profiles of all antiseptic solutions in the context of laser use, Duraprep's composition makes it particularly unsuitable in environments where lasers are being employed, due to the potential for ignition and associated hazards.