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': "Corneal layer responsible for deturgescence – \nSelect and explain. \nA. Bowman's membrane, B. Endothelium, C. Epithelium, D. Stromal", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Endothelial pumps maintain stroma in a relatively deturgesced state (relative state of dehydration) which is responsible for maintenance of transparency.', 'role': 'assistant'}]