This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ocular trauma , Subject name: Ophthalmology
[{'content': 'Chalcosis is seen with- \nSelect and explain. \nA. Pb, B. Cu, C. Fe, D. Hg', 'role': 'user'}, {'content': 'Answer: B \nExplanation: *Chalcosis refers to the specific changes produced by the alloy of copper in the eye. Ref: Khurana 7th/e p.452', 'role': 'assistant'}]