Anthelmintics are commonly used to eliminate:

Anthelmintics are specifically designed to target and eliminate helminths, which are parasitic worms such as tapeworms, roundworms, and flukes. Their primary function is to disrupt the life cycle and physiology of these parasites, leading to their expulsion or death within the host.

The correct choice focuses on the role of anthelmintics in treating parasitic infestations, which is the key aspect of their usage. In contrast, the other options refer to infections caused by different types of pathogens: bacterial infections are targeted by antibiotics, viral infections are treated with antiviral agents, and fungal infections are addressed with antifungal medications. Thus, anthelmintics are defined distinctively by their effectiveness against helminthic infections, making the correct answer the one that highlights their primary purpose.