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 of blurred vision and absent pupillary response with rapidly progressive descending muscular weakness manifesting as quadriparesis in an afebrile 20 year old male with preserved sensorium is - \nSelect and explain. \nA. Porphyria, B. Botulism, C. Polio, D. Diphtheria', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is tb' i.e., Botulism Remember these important points about Botulismo Acute onset of weakness in muscles innervated by cranial nerve with prominent bulbar palsy (4D's) i.e. -# Diplopia# Dysphonia# Dysphagia# Dysarthriao Descending symmetrical weakness occurs often leading to weakness,o Sensory' abnormalities are absent because only motor and autonomic nerves affected.o Mental function not affected o Afebrileo Absent pupillaty reflexes", 'role': 'assistant'}]