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: Forensic Medicine
[{'content': 'Optic atrophy can be caused by poisoning -a) Phosphorusb) Ethyl alcoholc) Methyl alcohol d) Lead \nSelect and explain. \nA. bc, B. c, C. ac, D. ad', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Both methyl alcohol and ethyl alcohol can cause optic atrophy.', 'role': 'assistant'}]