This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
[{'content': 'Diabetes mellitus can lead to - \nSelect and explain. \nA. Cataract, B. Rubeosis iridis, C. Retinal detachement, D. IH,IV,andVInervespalsy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: All of the above are correct answers Diabetes leads to Diabetic retinopathy which is classified into two stages Non-proliferative DR Proliferative DR Which cause retinal vascular micro aneurysm, blot hemorrhages , cotton wool spots Neovascularisation, retinal detachment , rubeosisiridis and neovascular glaucoma Cranial nerves 4, 6 & 7 are also involved Ref Harrison 17/e p2287 Parson p238, 171', 'role': 'assistant'}]