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': 'Macular edema is caused by all except – \nSelect and explain. \nA. Micro aneurysm, B. Capillary dilatation, C. Neovascularization, D. None', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Causes of macular edema :-\n\nMetabolic alteration :- Diabetes, retinitis pigmentosa, inherited cystoid macular edema (CME).\nIschemia CRVO, Diabetic retinopathy, severe hypertensive retinopathy, HELLP syndrome, vasculitis.\nMechanical force :- Vitreous traction on the macula.\nInflammation :- Intermediate uveitis, post-operative CME, choroidal inflammatory diseases.\nPharmacotoxicity :- Epinephrine (in Aphakia), Betaxolol, latanoprost..', 'role': 'assistant'}]