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
[{'content': 'Which of the following statements regarding corneal transplantation is true: \nSelect and explain. \nA. Whole eye needs to be preserved in tissue culture, B. Donor not accepted if age >60 years, C. Specular microscopy analysis is used to assess endothelial cell count, D. HLA matching is mandatory', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Specular microscopy analysis is used to assess endothelial cell count', 'role': 'assistant'}]