The correct option is C Diphtheria
Viruses vary from bacteria in that they have a unique structure and way of survival. Antibiotics can't destroy viruses because they don't have cell walls; instead, they're enveloped by a protective protein coat. Viruses, unlike bacteria, which attack your body's cells from the outside, move into, dwell in, and replicate themselves within your cells. Viruses, unlike bacteria, cannot multiply on their own; instead, they attach themselves to healthy cells and reprogram them to produce new viruses. Antibiotics do not work on viruses because of all of these differences. Diphtheria being a bacterial disease can be treated by antibiotics.