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: Pathology
Pink disease is seen due to 
Select and explain. 
A. Internal resorption, B. Mercury poisoning, C. Arsenic poisoning, D. Trauma
B: Mercury poisoning
Answer: B: Mercury poisoning 
Explanation: Pink disease (infantile acrodynia) was especially prevalent in the first half of the 20th century. Primarily attributed to exposure to mercury (Hg) commonly found in teething powders.