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
Not a cause of consecutive optic atrophy: 
Select and explain. 
A. Retinitis pigmentosa(RP), B. CRAO, C. Pathological Myopia, D. Retrobulbar neuritis
D: Retrobulbar neuritis
Answer: D: Retrobulbar neuritis 
Explanation: Retrobulbar neuritis is considered as Primary optic atrophy.