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
Attenuated retinal vessels with bony corpuscular like lesion seen in – 
Select and explain. 
A. Diabetes mellitus, B. Hypertension, C. Retinitis pigmentosa, D. Eales disease
C: Retinitis pigmentosa
Answer: C: Retinitis pigmentosa 
Explanation: Attenuated & thread like retinal vessels and retinal pigmentary changes (Bone spicule intraneural retinal pigmentation) is seen in retinitis pigmentosa.