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 exoplasmic transpo, D. Swelling of the axon
B: Disruption of neurofilament
Answer: B: Disruption of neurofilament 
Explanation: B i.e. Disruption of neurofilament The pincipal pathophysiology of optic disc swelling is blockage of axoplasmic tranpoQ. It shows signs of edema without inflammation with collection of extra-cellular fluidQ. The nerve fibre of the optic nerve head are also swollen.