This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: viral infection, Subject name: Medicine
[{'content': 'Post exposure prophylaxis of HIV is? \nSelect and explain. \nA. Raltregavir+ Emtricitabine + tenofovir, B. Zidovudine+ Lamivudine+ Indinavir, C. Zidovudine + lamivudine+ abacavir, D. Raltregavir + Emtricitabine + Maraviroc', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Chance of person / Doctor getting HIV after prick from HIV positive is 0.3% Post Exposure Prophylaxis-Raltegravir + Emtricitabine + Tenofovir PEP not effective after 72 hours', 'role': 'assistant'}]