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': 'Antidote for arsenic poisoning is \nSelect and explain. \nA. Ferric oxide, B. Aluminium oxide, C. Magnesium oxide, D. Nickel oxide', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e. Ferric oxide Treatment of arsenic poisoning includes stomach wash and use of freshly precipitated hydrated ferric oxide as an antidote (which forms ferric arsenite a harmless salt).", 'role': 'assistant'}]