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': 'Sea - Fan retina is a feature of \nSelect and explain. \nA. CRAO, B. CRVO, C. Sickle cell retinopathy, D. Chloroquine retinopathy', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Sickle cell disease - Sea - Fan retina.', 'role': 'assistant'}]