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 Diptheria is - 
Select and explain. 
A. 2 - 6 days, B. 2 - 6 hrs, C. 2 - 6 weeks, D. 2 - 6 months
A: 2 - 6 days
Answer: A: 2 - 6 days 
Explanation: . Ans. is `a' i.e., 2 - 6 days - The incubation period of diphtheria is commonly 3-4 days.