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': 'Which is a spinal poison: \nSelect and explain. \nA. Strychnine, B. Organophosphorus, C. Oleander, D. Cannabis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Strychnine', 'role': 'assistant'}]