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
A patient presented with peripheral field loss and fundus examination shows waxy exudates & pale disc with pigmentation around retinal vessels, diagnosis is – 
Select and explain. 
A. Behcet's syndrome, B. Chorioretinitis, C. Open angel glaucoma, D. Retinitis – pigmentosa
D: Retinitis – pigmentosa
Answer: D: Retinitis – pigmentosa 
Explanation: Peripheral visual field defect, pale waxy disc and pigmentation around retinal vessels (perivascular pigmentation) suggest the diagnosis of retinitis pigmentosa.