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: Ophthalmology
[{'content': 'All the following intraocular foreign bodies produce suppurative reaction except \nSelect and explain. \nA. Copper, B. Zinc, C. Nickel, D. Gold', 'role': 'user'}, {'content': 'Answer: D \nExplanation: No reaction of gold (inert).', 'role': 'assistant'}]