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
Ring scotoma is a feature of – 
Select and explain. 
A. Blue dot cataract, B. Diabetic retinopathy, C. Nuclear cataract, D. Retinitis pigmentosa
D: Retinitis pigmentosa
Answer: D: Retinitis pigmentosa 
Explanation: None