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': 'Most metabolically active layer of Cornea is \nSelect and explain. \nA. Descement membrane, B. Endothelium, C. Connective tissue stroma, D. Epithelium', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Most metabolically active layer of Cornea is Endothelium.', 'role': 'assistant'}]