This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'Mechanism of action of cholera toxin is \nSelect and explain. \nA. Ganglioside, B. Adenyl cyclase, C. Both 1 and 2, D. Exotoxin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: CHOLERA ENTEROTOXIN Light (L) toxin : Binds with ganglioside in epithelial cell membrane Heavy(H) toxin : Activates Adenyl cyclase in Epithelial cell wall which increase camp, leading to outpouring of isotonic fluid in lumen of intestine Ref: Park 25th edition Pgno : 253', 'role': 'assistant'}]