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': 'An 18 year old male presented with acute onset descending paralysis of 3 days duration. There is also history of blurring of vision for the same duration. On examination, the patient has quadriparesis with areflexia. Both the pupils are non-reactive. The most probably diagnosis is ? \nSelect and explain. \nA. Poliomyelitis, B. Botulism, C. Diphtheria, D. Porphyria', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Botulism", 'role': 'assistant'}]