This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Toxicology, Subject name: Medicine
[{'content': 'Acute onset areflexic quadriparesis with blurred vision and absent pupillary response in a 20 years old male, the most probable diagnosis is? \nSelect and explain. \nA. Porphyria, B. Botulism, C. Polio, D. Diphtheria', 'role': 'user'}, {'content': 'Answer: B \nExplanation: ANSWER: (B) BotulismREF: Harrison s 17th ed p. 901, CMDT - 2006/1410The clinical picture is most consistent with diagnosis of botulismBotulismh/o recent injection of canned or smoked foods or injection of drugSymmetric descending paralysis with prominent bulbar palsyDiplopia , dysarthria , dysphonia , dysphagiaPupils are fixed and dilatedPtosis and cranial nerve palsy with impairment of extra ocular muscles and fixed dilated pupils are characteristic signsSensory examination is normalNormal sensoriumAfebrile', 'role': 'assistant'}]