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
Preformed toxin produces diarrhea in which organism ? 
Select and explain. 
A. Staphylococcus, B. Vibrio cholera, C. Salmonella, D. Escherichia coli
A: Staphylococcus
Answer: A: Staphylococcus 
Explanation: Example of Preformed toxin i.e. toxin secreted in food: S.aureus enterotoxin, Bacillus cereus emetic type of enterotoxin and botulinum toxin.