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': "Neovascularization of iris is frequently seen in all/except – \nSelect and explain. \nA. CRVO, B. Diabetic retinopathy, C. Fuch's heterochromic cyclitis, D. Congenital cataract", 'role': 'user'}, {'content': "Answer: D \nExplanation: Causes of rubeosis iridis (neovascularization of iris)\nCommon :\n\nDiabetic retinopathy (most common cause), central retinal vein occlusion, Eale's disease, siclde-cell retinopathy.\n\nRare causes :\n\nLong standing retinal detachment, central retinal artery occlusion, intraocular inflammation (uveitis), intraocular tumors (choroidal melanoma, retinoblastoma), radiation retinopathy, ocular ischemic syndrome (carotid artery disease, carotid-cavernous fistula).", 'role': 'assistant'}]