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
[{'content': 'Fecal leucocytes are absent in all the following EXCEPT- \nSelect and explain. \nA. Giardiasis, B. Cryptosporidiasis, C. Campylobacter infection, D. Clostridium perfringes infection', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]