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': 'A 30 year old presents with nausea, weakness, headache and impaired vision and high anion gap metabolic acidosis. Most likely cause is: \nSelect and explain. \nA. Methanol, B. Ethanol, C. Ethylene glycol, D. Amphetamine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Methanol', 'role': 'assistant'}]