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
Chalky white optic disc on fundus examination is seen in all, except: 
Select and explain. 
A. Syphilis, B. Lebers hereditary optic neuropathy, C. Post papilledema optic neuritis, D. Traumatic injury to the optic nerve
D: Traumatic injury to the optic nerve
Answer: D: Traumatic injury to the optic nerve 
Explanation: Chalky white optic disc is not seen in traumatic injury of the optic nerve. Ref: Practical Approach to Ophthalmoscopic Retinal Diagnosis By A. K. Gupta, Shahana Mazumdar, Saurabh Choudhry, M.D, Page 68 ; Clinical Ophthalmology By Kanski, 4th Edition, Pages 588-9