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
Most common intraocular foreign body retained is 
Select and explain. 
A. Airgun pellets, B. Iron, C. Glass, D. Chisel
D: Chisel
Answer: D: Chisel 
Explanation: Common foreign bodies responsible for such injuries include: chips of iron and steel (90%), paicles of glass, stone, lead pellets, copper percussion caps, aluminium, plastic and wood. It is impoant to note that during chopping a stone with an iron chisel, it is commonly a chip of the chisel and not of the stone which enters the eye. Ref khurana 6/e p433