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
Noninvasive diarrhea can be caused by the following? 
Select and explain. 
A. Shigella, B. B. cereus, C. Salmonella, D. Y. enterocolitica
B: B. cereus
Answer: B: B. cereus 
Explanation: Ans. (b) Bacillus cereus Diarrhea of B. cereus is mediated by enterotoxin which resemble E. coli LT. The incubation period is 8-16 hours. Bacteria causing invasive diarrhea Shigella Salmonella Enteroinvasive E. coli Campylobacter jejuni