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’s disease is due to toxicity of: \nSelect and explain. \nA. Silver, B. Mercury, C. Lead, D. Tetracycline', 'role': 'user'}, {'content': 'Answer: B \nExplanation: ACRODYNIA (Pink disease, Swift\'s disease)\n\nCause of the disease has been established as a mercurial toxicity reaction, either actual mercury poisoning or more likely, an idiosyncrasy to the metal.\nThe source of the mercury is usually a teething powder, ammoniated mercury ointment, calomel lotion, or bichloride of mercury disinfectant.\nOccurs most frequently in young infants before the age of two years, although children are occasionally affected upto the age of five or six years.\nThe skin,\xa0particularly of the hands, feet, nose, ears and cheeks becomes red or pink and has a cold "clammy feeling".\nThe appearance has been described as resembling raw beef.\nThe skin over the affected areas peels frequently.\nSevere sweating is an almost constant feature of acrodynia.\nOther features are a state of extreme irritability, photophobia with lacrimation, muscular weakness, tachycardia, hypertension, insomnia, gastrointestinal upset and stomatitis.\nThe children will frequently tear their hair out in patches.\n\nRef: Shafer\'s textbook of oral pathology 7th edition page 559', 'role': 'assistant'}]