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': 'Toxin acting on cGMP- \nSelect and explain. \nA. Heat stable E. coli toxin, B. Heat labile E. coli toxin, C. Cholera toxin, D. Shiga toxin', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Heat stable E. coli toxin . Cholera toxin (CT) and labile toxin of E.coli (LT) act by activating cAMP. . Stable toxin of E.coli acts by activating cGMP. Remember . Though the mechanism of labile toxin of E.coli (LT) and cholera toxin (CT) is same, cholera toxin is about a hundred times more potent than LT.", 'role': 'assistant'}]