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: Medicine
Poisoning of food by which of the organisms has the shortest incubation period - 
Select and explain. 
A. S. aureus, B. Salmonella, C. Botulism, D. Cl. perfringesn
A: S. aureus
Answer: A: S. aureus 
Explanation: None