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
[{'content': 'From A drugs which acts through inhibition of integrase activity of virus ? \nSelect and explain. \nA. Raltegravir, B. Tiprinavir, C. Enfuviide, D. Etravirine', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Raltegravir", 'role': 'assistant'}]