This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
[{'content': 'Post exposire prophylaxis is indicated in- \nSelect and explain. \nA. HBV, B. Rabies, C. Diphtheria, D. Measles', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Simultaneous administration of HBIG and hepatitis B vaccine is more efficacious than HBIG alone. This combined procedure is ideal both for prophylaxis of persons accidentally exposed to blood known to contain hepatitis B virus and for prevention of carrier state in the new born babies of carrier mothers (refer pgno 217 park 23 rd edition)', 'role': 'assistant'}]