This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cornea, Subject name: Ophthalmology
[{'content': "KF ring in Wilson's disease is seen at the level of: \nSelect and explain. \nA. Descemet's membrane, B. Epithelium, C. Endothelium, D. Stroma", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans: A (Descemet's membrane) Ref: BASAK Essentials of Ophthalmology. 5th edition, pg no 163Explanation: (See the following table)In KF ring, the copper deposits are seen in the vertical meridian (6 &12o'clock position) in the early stages.It is seen in all Wilson's patients if CNS is involvedWith penicillamine therapy . it disappears.Other manifestations of Wilson's disease are sunflower cataract & defective accommodation.", 'role': 'assistant'}]