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': 'Jet-black spots in the retina are seen in: September 2008 \nSelect and explain. \nA. Retinoblastoma, B. Diabetic retinopathy, C. Retinitis pigmentosa, D. Hypeensive retinopathy', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C: Retinitis pigmentosa', 'role': 'assistant'}]