This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Poisoning, Subject name: Anatomy
[{'content': 'All are features of chronic arsenic poisoning except \nSelect and explain. \nA. Aldrich Mees lines, B. Raindrop pigmentation, C. Buonian lines, D. Black foot disease', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Cutaneous manifestations of chronic arsenic poisoning Rain drop pigmentation Aldrich Mees lines Black foot disease Perforation of nasal septum Ref: FORENSIC MEDICINE AND TOXICOLOGY Dr PC IGNATIUS THIRD EDITION PAGE 422', 'role': 'assistant'}]