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
[{'content': 'Pink disease is seen due to \nSelect and explain. \nA. Internal resorption, B. Mercury poisoning, C. Arsenic poisoning, D. Trauma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 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.', 'role': 'assistant'}]