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
Antidote for arsenic poisoning is 
Select and explain. 
A. Ferric oxide, B. Aluminium oxide, C. Magnesium oxide, D. Nickel oxide
A: Ferric oxide
Answer: A: Ferric oxide 
Explanation: 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).