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': 'Not a symptom of inorganic chronic lead poisoning: JIPMER 12 \nSelect and explain. \nA. Constipation, B. Insomnia, C. Colic, D. Anorexia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Insomnia', 'role': 'assistant'}]