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
For which of the following are live vaccines used 
Select and explain. 
A. Measles, B. Cholera, C. Small pox, D. All
D: All
Answer: D: All 
Explanation: Ans. is 'a' i.e., Measles; 'b' i.e., Cholera; 'c' i.e., Small pox