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': "Wilson's disease characterised by all EXCEPT \nSelect and explain. \nA. Glaucoma, B. Kayser- Fleisher ring, C. Sunflower cataract, D. Nystagmus", 'role': 'user'}, {'content': "Answer: A \nExplanation: (Glaucoma) (507- Parson 20th) (410-KH 4th)WILSON'S DISEASE Systemic featuresExtrapyramidal signs **- Cirrhosis** Extra occular featuresKayser- Fleisher ring** Intraocular features- Sunflower cataract**- Retina showes deposition of the golden plaque at the posterior pole which reflect the light with a metallic sheen", 'role': 'assistant'}]