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': 'Polyopia is a symptom of: \nSelect and explain. \nA. Coical cataract, B. Cupuliform cataract, C. Radiational cataract, D. Electrical cataract', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Coical cataract', 'role': 'assistant'}]