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': 'Constricted pupil is seen in all poisoning, except: UPSC 13 \nSelect and explain. \nA. Paracetamol, B. Opium, C. Phenol, D. OPC', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Paracetamol', 'role': 'assistant'}]