Which of the following items is NOT classified as biohazard waste?

Biohazard waste typically includes materials that may pose a risk of infection or contamination, such as bodily fluids and items that have been in contact with them. Blood and plasma samples fall into this category because they can carry pathogens. Medical gloves are also classified as biohazard waste once they have been used and potentially contaminated with biological materials.

Empty paper files, on the other hand, do not contain any blood, bodily fluids, or infectious substances. As a result, they do not pose a risk of infection and are not considered biohazard waste. Therefore, they can be disposed of with regular waste, making them distinct from the other items listed that directly relate to biohazard classifications. This is why the correct choice in this context is the empty paper files.