This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
Incubation period of staphylococcal food poisoning is: 
Select and explain. 
A. 4-6 hrs, B. 6-12 hrs, C. 12-18 hrs, D. 18-24 hrs
A: 4-6 hrs
Answer: A: 4-6 hrs 
Explanation: Ans.is 'a' i.e., 4-6 hours (Ref: Ananthanarayan, 9th/e, p. 202 and 8th/e, p. 198)* Incubation period of staphylococcal food poisoning is 1-6 hours.* Toxin can be detected by ELISA, Latex agglutination test and toxin gene detection by PCR.