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': "Schwalbe's ring corresponds to: \nSelect and explain. \nA. Corneal endothelium, B. Descemet's membrane, C. Schlemm's canal, D. Ciliary body", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. Descemet's membrane", 'role': 'assistant'}]