What is a virucidal agent capable of?

A virucidal agent is specifically designed to destroy viruses, making option B the correct choice. These agents work by targeting the virus's structure or its ability to replicate, effectively neutralizing the pathogen. Virucides are commonly used in various settings, including healthcare and sanitation, to prevent the transmission of viral infections.

In contrast, the other options focus on different types of microorganisms. For instance, inhibiting fungal growth pertains to antifungal agents, which are designed to combat fungi rather than viruses. Eliminating bacteria relates to antibacterial agents, specifically targeting bacterial cells. Preventing infections encompasses a broader range of practices, including the use of vaccines and antiseptics, but does not necessarily imply the action of a virucidal agent alone. Thus, option B accurately reflects the function of a virucidal agent within the context of microbiological control.