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
Food poisoning occurs in 6-7 hours by all EXCEPT: 
Select and explain. 
A. Staphylococcus, B. E. coli, C. Clostridium, D. Bacillus cereus
B: E. coli
Answer: B: E. coli 
Explanation: E. coli REF: See APPENDIX-22 for "Acute infectious diarrhea"