This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Forensic Toxicology - Concepts, Statutes, Evidence, and Techniques, Subject name: Forensic Medicine
[{'content': 'Sample of spinal cord preseved in: (Repeat) \nSelect and explain. \nA. Strychnine poisoning, B. Arsenic poisoning, C. Yellow Oleander poisoning, D. Nerve gas poisoning', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans: A (Strychnine poisoning) Ref: The Essentials of Forensic Medicine and Toxicology by KS Narayan Reddy. 29th edition. 2010. Pg:Explanation:Refer 2011 Forensic medicine question explanation', 'role': 'assistant'}]