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
All satements are true about papilloedema except - 
Select and explain. 
A. Collection of extra - cellular fluid, B. Disruption of neurofilament, C. Stasis of axoplasmic transport, D. Swelling of the axon
B: Disruption of neurofilament
Answer: B: Disruption of neurofilament 
Explanation: Primary pathology of papilloedema is blockage of axoplasmic transport (axoplasmic stasis) which causes swelling of axons and ultimately extracellular edema.