This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
Which of the following is an Integrase inhibitor used to treat HIV? 
Select and explain. 
A. Maraviroc, B. Ritonavir, C. Raltegravir, D. Enfluviritide
C: Raltegravir
Answer: C: Raltegravir 
Explanation: Integrase InhibitorsHIV integrase aids the inseion of viral DNA into host cell DNA. This occurs after the viral reverse transcriptase (RNA/DNA-dependent DNA polymerase) produces double-stranded viral DNA. This step is key to the cell becoming a permanent carrier. Two integrase inhibitors, raltegravir and elvitegravir, are approved for use.Ref: Sherris microbiology; 6th edition; Page no: 158