Which drug class is indicated for treating conditions caused by anaerobic bacteria?

The correct choice is antibiotics, as this class of medication is specifically designed to target bacterial infections, including those caused by anaerobic bacteria. Anaerobic bacteria thrive in environments without oxygen and can lead to serious infections, particularly in deep tissue or abscesses. Antibiotics that are effective against anaerobes include drugs such as metronidazole and clindamycin, which are commonly used to treat infections in dental procedures, abdominal infections, and certain skin infections.

Other drug classes listed are not effective against anaerobic bacteria. Antivirals are used to treat viral infections, antifungals target fungal infections, and antiretrovirals are specific to HIV and other retroviruses. Hence, antibiotics are the appropriate choice for addressing conditions associated with anaerobic bacteria.