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: Pharmacology
[{'content': 'Prolonged use of the following drug has been implicated in the causation of subacute myelo–optic neuropathy (SMON) : \nSelect and explain. \nA. Diloxanide furoate, B. Quiniodochlor, C. Emetine, D. Furazolidone', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]