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': 'Orderal poison is? \nSelect and explain. \nA. Physostigmine, B. Digoxin, C. Cocaine, D. Atropine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) PhysostigmineRef.:Medical Toxicology edited by Richard C. Dard 3rd ed/567', 'role': 'assistant'}]