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': 'Bacillus Bacillus anthracis toxin rediates its action through all except: \nSelect and explain. \nA. cAMP, B. Stimulating macrophages, C. TNFa, D. cGMP', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is. 'd' i.e. cGMP", 'role': 'assistant'}]