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
All of the following are true about corneal endothelium except: 
Select and explain. 
A. Cell density is about 3000 cells/min' at bih, B. Corneal decompensation occurs when cell count is decreased by 50 percent, C. Endothelial cells contain active pump mechanism, D. Endothelium is best examined by specular microscopy
B: Corneal decompensation occurs when cell count is decreased by 50 percent
Answer: B: Corneal decompensation occurs when cell count is decreased by 50 percent 
Explanation: Ans. Corneal decompensation occurs when cell count is decreased by 50 percent