This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cornea and sclera, Subject name: Ophthalmology
Corneal deturgescence is maintained by - 
Select and explain. 
A. Epithelium, B. Endothelium, C. Stroma, D. Descmet's membrane
B: Endothelium
Answer: B: Endothelium 
Explanation: Endothelium consists of single layer of flat ploygonal epithelilal cells.It contains 'active pump' mechanism which keeps cornea dehydrated. Reference:Comprehensive Ophthalmology,AK Khurana,6th edition,pg no.96