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': "Mizuo - phenomenon is seen in – \nSelect and explain. \nA. Fundus albipathicus, B. Fundus flavimaculatus, C. Oguchi's disease, D. Choroideremia", 'role': 'user'}, {'content': "Answer: C \nExplanation: Fundus changes of Oguchi's disease becomes normal after prolonged dark adaptation. This is called Mizuo-Nakamura phenomenon.", 'role': 'assistant'}]