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 seen in: September 2012 
Select and explain. 
A. Glaucoma, B. Retinitis pigmentosa, C. Sympathetic ophthalmia, D. Vitreous hemorrhage
B: Retinitis pigmentosa
Answer: B: Retinitis pigmentosa 
Explanation: Ans. B i.e. Retinitis pigmentosa