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
Exudative plaques in the form of or "pseudomembranes" are due to: 
Select and explain. 
A. Esch coli, B. Clostridium difficile, C. Salmonella, D. Campylobacter jejuni
B: Clostridium difficile
Answer: B: Clostridium difficile 
Explanation: Clostridium difficile