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': "True statement about Band shaped Keratopathy is \nSelect and explain. \nA. Iron deposition in Bowman's membrane, B. Calcium deposition in Descemet's membrane, C. Iron chelating agents are used for treatment, D. Sarcodosis can be a cause", 'role': 'user'}, {'content': "Answer: D \nExplanation: Bone Shaped Keratopathy\n\nDegeneration disease occuring due to calcium deposition in Bowman's membrane.\n\nEtiology\xa0-\n\nHypercalcemia\nStill's disease\nSarcoidosis\n\nTreatment :\n\nChelation with EDTA", 'role': 'assistant'}]