This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuro-ophthalmology, Subject name: Ophthalmology
[{'content': 'Fundoscopy of a patient shows chalky white optic disc with well defined margins. Retinal vessels and surrounding Retina appears normal. Which of the following is the most likely diagnosis - \nSelect and explain. \nA. Primary Optic Atrophy, B. Post-neuritic secondary optic atrophy, C. Glaucomatous optic atrophy, D. Consecutive optic atrophy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Optic atrophy refers to the death of the retinal ganglion cell axons that comprise theoptic nerve with the resulting picture of a pale optic nerve on fundoscopy. Optic atrophy is an end stage that arises from myriad causes of optic nerve damage anywhere along the path from the retina to the lateral geniculate Ref AK khurana 6/e', 'role': 'assistant'}]