This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Immunomodulator which is used for genital was is: 
Select and explain. 
A. A Podophyllum, B. Imiquimod, C. Predrisolone, D. IFN
B: Imiquimod
Answer: B: Imiquimod 
Explanation: Imiquimod is an immunomodulator shown to be effective in the treatment of external genital and perianal was. Ref: Basic and Clinical Pharmacology By Katzung, 10th Edition, Pages 816, 817, 996