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
[{'content': 'Fundoscopic features of papilledema include all the following except - \nSelect and explain. \nA. Ill- defined disc margin, B. Deep physiological cup, C. Absent venous pulsation, D. Bending of blood vessels', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Physiological cup is filled and obliterated (not becomes deep).\n\nOphthalmoscopic signs of papilloedema \n\nBlurring of disc margin (first sign)\nVenous :- Engorgment, congestion, loss of pulsation\nHyperemia of the disc with capillary dilatation.\nFilling of physiological cup with gradual obliteration of physiological cup.\nGradual elvetion of disc (mushroom or dome shaped) with sharp bending of vessels over its margins.\nCotton- wool spots (soft exudates) and both flame shaped (superficial) and punctate (deep) hemorrhages\nMacular fan or macular star due to hard exudates.\nLate findings in long standing (vintage) papilloedema: - Markedly elevated disc with champagne cork appearance, post neuritic optic atrophy, corpora amylacea deposits on disc margin, generalized retinal pigmentation.', 'role': 'assistant'}]