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: Forensic Medicine
[{'content': "A man who is working in marine timbers presented with a paicular appearance on nails which is diagnosed as Mee's lines. Mee's lines are seen in poisoning with: \nSelect and explain. \nA. Arsenic, B. Lead, C. Mercury, D. Copper", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Dermatologic effects of Arsenic poisoning: Findings occasionally appear after a delay of 1-6 weeks. Desquamation (paicularly involving the palms and soles) A diffuse maculopapular rash Periorbital edema Transverse white striae in the nails (Aldrich-Mees lines) may become apparent months after an acute intoxication. Ref: Kosnett M.J. (2012). Chapter 24. Arsenic. In K.R. Olson (Ed), Poisoning & Drug Overdose, 6e.', 'role': 'assistant'}]