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': 'Common toxin through vegetables: DNB 08 \nSelect and explain. \nA. Boric acid, B. Carbolic acid, C. Taaric acid, D. Oxalic acid', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. Oxalic acid', 'role': 'assistant'}]