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
Incubation period of salmonella typhi - 
Select and explain. 
A. 2-5 days, B. 3-21 days, C. 14-25 days, D. 0-60 days
B: 3-21 days
Answer: B: 3-21 days 
Explanation: ‘The incubation period for S. Typhi averages 10–14 days but ranges from 3 to 21 days, with the duration likely reflecting the inoculum size and the host’s health and immune status.’