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': 'True about anthrax toxin are all except: \nSelect and explain. \nA. Has three fractions, B. Increase cAMP, C. Coded by plasmid, D. Inhibits protein synthesis', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is. 'd' i. e. Inhibits protein synthesis", 'role': 'assistant'}]