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
Mechanism of action of cholera toxin is 
Select and explain. 
A. Ganglioside, B. Adenyl cyclase, C. Both 1 and 2, D. Exotoxin
C: Both 1 and 2
Answer: C: Both 1 and 2 
Explanation: 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