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
Mizuo - phenomenon is seen in – 
Select and explain. 
A. Fundus albipathicus, B. Fundus flavimaculatus, C. Oguchi's disease, D. Choroideremia
C: Oguchi's disease
Answer: C: Oguchi's disease 
Explanation: Fundus changes of Oguchi's disease becomes normal after prolonged dark adaptation. This is called Mizuo-Nakamura phenomenon.