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': 'Brush fire appearance of fundus is seen in \nSelect and explain. \nA. Toxoplasmosis, B. CMV retinitis, C. Chloroquine toxicity, D. Bacterial endocarditis', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., CMV retinitis", 'role': 'assistant'}]