Name the correct therapeutic use for Acyclovir (Zovirax):

A. Acyclovir (Zovirax) is a nucleoside analog antiviral medication that inhibits viral DNA synthesis, thereby suppressing the replication of herpes simplex virus (HSV) types 1 and 2, as well as varicella-zoster virus (VZV). It is used to treat initial and recurrent episodes of oral and genital herpes, prevent outbreaks in immunocompromised patients, and reduce the severity and duration of shingles. Timely administration can also decrease viral shedding and transmission. B. Acyclovir does not have analgesic or anti-inflammatory effects. While herpes infections can be painful, acyclovir addresses the underlying viral replication but does not directly relieve pain. Pain management must be handled with analgesics or topical numbing agents, depending on symptom severity. C. Acyclovir does not influence blood glucose metabolism and has no role in treating diabetes or hyperglycemia. Antidiabetic medications, including insulin or oral hypoglycemics, are required for managing elevated blood sugar. D. Acyclovir is not an antihistamine or corticosteroid and cannot relieve itching, rashes, or other allergic responses. Allergic conditions are treated with antihistamines, corticosteroids, or other anti-inflammatory medications rather than antiviral therapy.