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': "'Snow ball' opacities near the ora-serrata are pathognomonic of: \nSelect and explain. \nA. Fungal endophthalmitis, B. Pars planitis, C. Diabetic retinopathy, D. Anterior choroiditis", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Pars planitis', 'role': 'assistant'}]