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
[{'content': 'In Acute angle closure glaucoma all are seen EXCEPT: \nSelect and explain. \nA. Cupping of disc, B. Bayonetting sign, C. Snow banking, D. Oval cup', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 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', 'role': 'assistant'}]