This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Toxicology - 3, Subject name: Forensic Medicine
[{'content': 'The following plant contains the toxic substance- \nSelect and explain. \nA. Atropine, B. Cannabis, C. Ricin, D. Oxalic acid', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The plant is Indian spinach, which contains oxalic acid(image given) oxalic acid --> stomach-->blood-->Hypocalcemia Treatment is IV calcium.', 'role': 'assistant'}]