HIV integrase inhibitor is?

HIV integrase inhibitor is ?
a) Elvitegravir
b) Abacavir
c) Maraviroc
d) Tenofovir
Correct Answer - A
Ans. is ‘a’ i.e., Elvitegravir
Integrase inhibitors
Raltegravir and Elvitegravir act by inhibiting enzyme integrase