This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti-Viral, Subject name: Pharmacology
[{'content': 'Mechanism of action of maraviroc: \nSelect and explain. \nA. Cyt P 450 inhibitor, B. GP 41 inhibitor, C. CCR5 inhibitor, D. GP 120 inhibitor', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (c) CCR5 inhibitorRef: Mosby drug reference for health professionals 2015 ed / 996* Maraviroc is an anti HIV drug which comes under fusion inhibitor category.* This drug binds to the receptor and inhibits the fusion stage of virus and hence inhibits their speed of replication.* There are two types of fusion inhibitors:Drugs which bind to CCR5 receptorDrugs which bind to GP 41 receptorMaraviroc: active against CCR5 tropic virus.Enfuvirtide: prevents entry of virus into host cell.Can be given orally.Can only be given in s.c. injection form.', 'role': 'assistant'}]