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: Psychiatry
[{'content': 'Pica is associated with poisoning: NEET 14 \nSelect and explain. \nA. Mercury, B. Arsenic, C. Lead, D. Phosphorus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Lead', 'role': 'assistant'}]