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
Toxin of emetic strain of bacillus cereus resembles in action of 
Select and explain. 
A. Heat stable toxin of S.aureus, B. Heat labile toxin of E.coli, C. Cholera toxin, D. Pseudomonas toxin
A: Heat stable toxin of S.aureus
Answer: A: Heat stable toxin of S.aureus 
Explanation: It is a preformed toxin similar to S.aureus enterotoxin.