This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Retina, Subject name: Ophthalmology
[{'content': 'The fundus finding shown below is. \nSelect and explain. \nA. Cotton wool spots, B. Tuberous sclerosis, C. CMV retinitis, D. Cattle trucking appearance', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Cotton wool spots.', 'role': 'assistant'}]