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
Diabetes mellitus can lead to: 
Select and explain. 
A. Vitreous haemorrhage, B. Rubeosis iridis, C. Retinal detachment, D. All
D: All
Answer: D: All 
Explanation: A i.e. Vitreous haemorrhage; B i.e. Rubeosis iridis; C i.e. Retinal detachment