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
Detected by stool examination except - 
Select and explain. 
A. Staphyloccous food poisoning, B. Giardiasis, C. Fungus, D. None
D: None
Answer: D: None 
Explanation: Ans. is None . All given options can cause diarrhea and stool examination is impoant for diagnosis. "Examination of stool sample is an impoant supplement to the narative history".