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
Lepra bacilli can survive outside the human body up to: 
Select and explain. 
A. 7 days, B. 12 days, C. Zero days, D. 5 days
B: 12 days
Answer: B: 12 days 
Explanation: Ans. is. 'b' i. e., 12 days