This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NPCBVI, NACP, Subject name: Social & Preventive Medicine
[{'content': 'For post-exposure prophylaxis of HIV is:- \nSelect and explain. \nA. Tenoir + Lamivudine for 4 weeks, B. Lamivudine + Ritonavir for 4 weeks, C. Zidovudine + Lamivudine + Indinavir for 4 weeks, D. Single dose Zidovudine + Lamivudine + Indinavir', 'role': 'user'}, {'content': 'Answer: A \nExplanation: New post-exposure guidelines for HIV for adolescents and adults: Preferred backbone regimen: Tenofovir + Lamivudine for 4 weeks. Preferred third drug: Lopinavir / Ritonavir or Atazanavir / Ritonavir.', 'role': 'assistant'}]