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': 'MC retained foreign body intraocularly- \nSelect and explain. \nA. Airgun pellets, B. Iron, C. Glass, D. Silver', 'role': 'user'}, {'content': 'Answer: B \nExplanation: *The foreign bodies most likely to penetrate and be retained in the Eye are minute chips of iron or steel (accounting for 90% all foreign bodies in industry). Ref: Parson 22nd/e p.385', 'role': 'assistant'}]