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
Normal endothelial cell count in Corneal endothelium is 
Select and explain. 
A. 500-1000 cells / sq.mm, B. 1500-2000 cells / sq.mm, C. 2000-2500 cells / sq.mm, D. 2500-3000 cells / sq.mm
D: 2500-3000 cells / sq.mm
Answer: D: 2500-3000 cells / sq.mm 
Explanation: Normal endothelial cell count in Corneal endothelium is 2500-3000 cells / sq.mm