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: Microbiology
[{'content': 'For which of the following are live vaccines used \nSelect and explain. \nA. Measles, B. Cholera, C. Small pox, D. All', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'a' i.e., Measles; 'b' i.e., Cholera; 'c' i.e., Small pox", 'role': 'assistant'}]