This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
[{'content': 'A 32 yr. old female is suffering from watery diarrhoea, hyponatremia and hypokalemia. Later it was diagnosed as cholera. The mechanism of action of heat labile toxin of Vibrio cholerae is \nSelect and explain. \nA. Increased CAMP, B. Increased CGMP, C. Inhibiting the release of ACH from nerves, D. Inhibiting protein synthesis by inactivating EF 2', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Enterotoxin -heat labile or cholera toxin acts by increasing CAMP which causes hypersecretion of water and electrolytes Ref: Textbook of Microbiology Baveja 5th ed Pg 279', 'role': 'assistant'}]