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': "'Puff-balls' opacities in the vitreous are pathognomonic of: \nSelect and explain. \nA. Fungal endophthalmitis, B. Pars planitis, C. Exudative retinopathy of Coats, D. Sympathetic ophthalmitis", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Fungal endophthalmitis', 'role': 'assistant'}]