Which of the following gases has a color designation of brown?

The correct choice indicating that helium has a color designation of brown is not accurate. Instead, the gas that is designated with a color code of brown is carbon dioxide. In the context of gas identification, color codes are very important for safety and clarity in handling medical gases.

Carbon dioxide is specifically labeled with the color brown to differentiate it from other gases, such as nitrogen and oxygen, which have their own distinct color designations. Nitrogen is typically designated by black, while oxygen is identified with green. Helium, on the other hand, does not have a specific color designation associated with it in the same way.

Understanding these color designations helps first responders and healthcare workers quickly identify and handle gases appropriately, reducing the risk of errors and ensuring safety during medical procedures.