This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
All are used to treat influenza B except 
Select and explain. 
A. Oseltamivir, B. Zanamivir, C. Premavir, D. Ribavarin
D: Ribavarin
Answer: D: Ribavarin 
Explanation: 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