This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Occupational Health, Subject name: Social & Preventive Medicine
[{'content': 'One of the following symptoms is NOT caused by inorganic lead poising: \nSelect and explain. \nA. Anemia, B. Insomnia, C. Pallor, D. Burtonian line', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. (b) InsomniaRef: K. Park 23rd ed. / 807-808* Insomnia is caused by organic lead poisoning.* Organic lead poisoning causes CNS side effects while Inorganic lead poisoning causes non-CNS side effects.Due to Organic Lead (CNS effects)Due to Inorganic Lead (Non-CNS effects)* Insomnia* Mental confusion* Headache* Delirium* Facial pallor: earliest and most consistent sign.* Anemia: Microcytic Hypochromic* RBC's stippling* Burtonian Line on upper gums* Lead Colic: constipation (or copper)* Lead Palsy (wrist + foot drop)", 'role': 'assistant'}]