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
In human corneal transplantation, the donor tissue is – 
Select and explain. 
A. Synthetic polymer, B. Donated human cadaver eyes, C. Donated eyes from live human beings, D. Monkey eyes
B: Donated human cadaver eyes
Answer: B: Donated human cadaver eyes 
Explanation: In corneal transplantation or keratoplasty the diseased cornea is removed and replaced with healthy cornea, obtained from cadavers.