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': "Peripheral neuritis with characteristic ‘wrist drop’ or 'foot drop' is seen in: \nSelect and explain. \nA. Lead poisoning, B. Mercury poisoning, C. Copper poisoning, D. Bismuth poisoning", 'role': 'user'}, {'content': "Answer: A \nExplanation: Lead intoxication is manifested by serious gastrointestinal disturbances which include nausea, vomiting, colic, and constipation. A peripheral neuritis also develops which may produce the characteristic wrist-drop or foot-drop.\xa0\nRef: Shafer's textbook of oral pathology 7th edition page 558", 'role': 'assistant'}]