Final answer:
Valganciclovir is an antiviral medication used mainly to treat cytomegalovirus (CMV) infections in immunocompromised patients.
Step-by-step explanation:
Valganciclovir is primarily indicated for the treatment of B) Viral infections. It is an antiviral medication that is a prodrug of ganciclovir and is used to treat diseases such as cytomegalovirus (CMV) infections, which are a common complication in immunocompromised individuals, such as organ transplant recipients and those with HIV/AIDS. Valganciclovir is not effective against bacterial, fungal, or parasitic infections.