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': 'Which of the following bacteria act by increasing cAMP \nSelect and explain. \nA. Staphylococcus aureus, B. E. coli heat stable toxin, C. Vibrio cholera, D. Salmonella', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Cholera produces a potent enterotoxin known as cholera toxin.\nThis toxin consists of', 'role': 'assistant'}]