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': 'Nausea, vomiting, blue line on gums, wrist/foot drops, pallor, colic are manifestations of poisoning due to:- \nSelect and explain. \nA. Mercury, B. Arsenic, C. Organic lead, D. Inorganic Lead', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Clinical picture of lead poisoning (Plumbism): Due to inorganic lead (Non - CNS effects) Due to organic lead (CNS effects) Facial Pallor: Earliest And Most Consistent Sign Anemia: Microcytic hypochromic Punctuate basophilia or stippling of RBCs Buonian Line: Lead sulphide on upper gums Lead colic: Constipation (or diarrhea) Lead palsy (Wrist / Foot drop). Insomnia Mental confusion Headache Delirium Encephalopathy.', 'role': 'assistant'}]