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
Not a symptom of inorganic chronic lead poisoning: JIPMER 12 
Select and explain. 
A. Constipation, B. Insomnia, C. Colic, D. Anorexia
B: Insomnia
Answer: B: Insomnia 
Explanation: Ans. Insomnia