All are used to treat influenza B except: (A) Oseltamivir, (B) Zanamivir, (C) Premavir, (D) Ribavarin
Answer is D. Neuraminidase inhibitors such as Oseltamivir, Zanamivir and Peramivir, which inhibit the viral enzyme neuraminidase in both influenza virus A and B, are effective for treatment and prophylaxis of influenza Amantadine and Rimantadine are active only against Influenza A Ref: Mason's Tropical Disease, 24th edition Pgno : 168-169