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': 'Which of the following toxins acts by inhibiting protein synthesis - \nSelect and explain. \nA. Cholera toxin, B. Shiga toxin, C. Pertussis toxin, D. LT of enterotoxigenic E.coli', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Toxin which acts by inhibiting protein synthesis:\n\nDiphtheria toxin and Pseudomonas Exotoxin A: Inhibiting elongation factor 2\nShiga toxin and Verotoxin (Shiga like toxin) of EHEC: Inhibiting 60s ribosome', 'role': 'assistant'}]