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
About retinitis pigmentosa, all are true EXCEPT: September 2012 
Select and explain. 
A. Ring scotoma, B. Central scotoma, C. Waxy pallor of disc, D. Bone spicule pigmentation in retina
B: Central scotoma
Answer: B: Central scotoma 
Explanation: Ans. B i.e. Central scotoma Retinitis pigmentosa Feature: Loss of visual acuity Microscopy: Irregular black deposits of clumped pigment in the peripheral retina (Bone spicules)