Regarding compressed oxygen cylinders used in the dental office, all of the following are correct EXCEPT:

Oxygen supports combustion (it is an oxidizer) but is not itself a fuel and does not 'burn'; calling it a fuel/combustible is incorrect, making that the EXCEPTION.Other options: U.S. medical oxygen tanks are green; oxygen vigorously supports combustion of other materials, which is why it must be kept from sparks and grease.Key exam takeaway: Oxygen is an oxidizer (supports fire), not a fuel; U.S. medical O2 cylinders are green.