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
Which of the following stimulate adenylate cyclase with G-protein coupled action ? 
Select and explain. 
A. Shiga toxin, B. Cholera toxin, C. Diphtheria toxin, D. Pseduomonas toxin
B: Cholera toxin
Answer: B: Cholera toxin 
Explanation: Ans. is 'b' i.e., Cholera toxin