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
MC retained foreign body intraocularly 
Select and explain. 
A. Airgun pellets, B. Iron, C. Glass, D. Chisel and hammer
B: Iron
Answer: B: Iron 
Explanation: B i.e. Iron 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)Q In chipping stone with an iron chisel, it is commonly a chip of the chisel and not of the stone() which enters the eye