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: Social & Preventive Medicine
At 1:00 pm a mother got a phone call from the school to pick her son who was a student of III class, as he was having excessive vomiting. The child was taken immediately to the Hospital where he admitted that he had taken ice-cream in lunch break at 11:30 am. Most likely he was suffering from food poisoning due to 
Select and explain. 
A. Salmonella, B. Staph aureus, C. Shigella, D. Vibrio cholera
B: Staph aureus
Answer: B: Staph aureus 
Explanation: None