This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pharmacology
[{'content': 'In methyl alcohol poisoning there is CNS depression,cardiac depression and optic nerve atrophy.These effects are produced due to: \nSelect and explain. \nA. Formaldehyde and formic acid, B. Acetaldehyde, C. Pyridine, D. Acetic acid', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Methanol is metabolised to formic acid & formaldehyde ,which produces these kinds of symptoms. Ref: kKD Tripathi 8th ed.', 'role': 'assistant'}]