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': "The type of cataract seen in Wilson's disease is: \nSelect and explain. \nA. Sunflower cataract, B. Snowflake cataract, C. Posterior subcapsular cataract, D. Coronary cataract", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Sunflower cataract', 'role': 'assistant'}]