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
HIV integrase inhibitor is ? 
Select and explain. 
A. Elvitegravir, B. Abacavir, C. Maraviroc, D. Tenofovir
A: Elvitegravir
Answer: A: Elvitegravir 
Explanation: Ans. is 'a' i.e., Elvitegravir Integrase inhibitors Raltegravir and Elvitegravir act by inhibiting enzyme integrase.