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': "Roth's spots in the fundus are seen in: \nSelect and explain. \nA. Diabetes, B. Chorioretinitis, C. Bacterial endocarditis, D. Retinoblastoma", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Retinoblastoma', 'role': 'assistant'}]