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
Diabetes mellitus can lead to - 
Select and explain. 
A. Cataract, B. Rubeosis iridis, C. Retinal detachement, D. IH,IV,andVInervespalsy
A: Cataract
Answer: A: Cataract 
Explanation: 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