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: Social & Preventive Medicine
Incubation period of typhoid -a)  3-20 daysb)  14-45 daysc)  5-10 daysd)  15-60 dayse) 10-14 days 
Select and explain. 
A. ae, B. b, C. ab, D. ad
A: ae
Answer: A: ae 
Explanation: None