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: Medicine
[{'content': 'A doctor was accidentally exposed to HIV by a needle stick injury while sampling HIV positive patient. A drug prescribed to him would be - \nSelect and explain. \nA. Zidovudine + Lamivudine + Indinavir for 4 weeks, B. Zidovudine + Lamivudine + Navirapine for 4 weeks, C. Zidovudine + Stavudine for 4 weeks, D. Zidovudine + Lamivudine for 4 weeks', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Needlestick injury is the most common cause of HIV infection among health care workers.\nThe guidelines for post-exposure prophylaxis of HIV are \n\nA) For routine exposures\n\na combination of two nucleoside reverse transcriptase inhibitors for 4 weeks.\n\nB) For high risk or complicated exposures\n\na combination of two nucleoside reverse transcriptase inhibitors plus a protease inhibitor for 4 weeks.\nInspite of the guidelines regimen B is given for all types of exposure\n\n\n\nThus the treatment is obvious in this doctor.\n\nAlso Remember\nExamples of\nNucleoside reverse transcriptase inhibitors\n\nZidovudine\nLamivudine\nStavudine\nDidanosine\nZalcitabine\nA bacavir\n\nProtease inhibitors\n\nSaquinavir\nIndinavir\nRitonavir\nNelfinavirAmprenavir', 'role': 'assistant'}]