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': 'Pepper salt fundus is seen in: \nSelect and explain. \nA. CMV retinitis, B. Toxoplasmosis, C. Rubella, D. Measles', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Rubella', 'role': 'assistant'}]