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
Sudden loss of vision in patient with diabetic retinopathy is due to: 
Select and explain. 
A. Cataract, B. Glaucoma, C. Vitreous defects, D. Papilloedema
C: Vitreous defects
Answer: C: Vitreous defects 
Explanation: Ans. Vitreous defects