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': 'Live attenuated vaccines are A/E \nSelect and explain. \nA. Measles, B. Rabies, C. Oral polio, D. Yellow fever', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The internationally available cell culture and embryonated egg-based vaccine consist of rabies virus that has been propagated in cell substrates such as human diploid cells, Vero cells, primary Syrian hamster kidney cells etc (refer pgno 279 park 23rd edition)', 'role': 'assistant'}]