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: Social & Preventive Medicine
[{'content': "Feer's disease is caused by toxicity of: \nSelect and explain. \nA. Arsenic, B. Antimony, C. Lead, D. Mercury", 'role': 'user'}, {'content': "Answer: D \nExplanation: Acrodynia is also known as Feer's disease or pink disease. It is caused by mercury toxicity. Ref :", 'role': 'assistant'}]