This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Primary Angle-Closure Glaucoma, Subject name: Ophthalmology
In Acute angle closure glaucoma all are seen EXCEPT: 
Select and explain. 
A. Cupping of disc, B. Bayonetting sign, C. Snow banking, D. Oval cup
C: Snow banking
Answer: C: Snow banking 
Explanation: ANSWER: (C) Snow bankingREF: Khurana 4th ed p. 216"Snow banking is seen in pars planitis not acute angle closure glaucoma"Optic disc changes in POAG include:High cup:disc ratioCup:disc ratio asymmetry between eyes (usually considered significant if greater than 0.2)Vertical elongation of cupFocal neuro-retinal rim thinning or notchingVessel bayonetingBeta-zone peripapillary atrophyDisc hemorrhage