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
Feer's disease is caused by toxicity of: 
Select and explain. 
A. Arsenic, B. Antimony, C. Lead, D. Mercury
D: Mercury
Answer: D: Mercury 
Explanation: Acrodynia is also known as Feer's disease or pink disease. It is caused by mercury toxicity. Ref :