This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Retina, Subject name: Ophthalmology
Which of the following is classic in proliferative diabetic retinopathy - 
Select and explain. 
A. Soft exudates, B. Hard exudates, C. Neovascularization, D. Papilloedema
C: Neovascularization
Answer: C: Neovascularization 
Explanation: Ans. is 'c' i.e., Neovascularization * The hallmark of PDR is the occurance of neovascularization over the changes of severe NPDR.Classification of Diabetic retinopathyNonproliferativeProliferativeA) Background retinopathy* Microaneurysm* Dot and blot hemorrhage (deep hemorrhage)* Hard exudate* Macular edema* Neovascularization of the disc (NVD)* Neovascularization elsewhere in the retina (NVE)* Vitreous hemorrhage* Fibrovascular proliferation* Traction retinal detachment* Iris surface neovascularization (rubeosis iridis or* neovascular glaucoma)B) Preproliferative retinopathy* Cotton-wool spots (soft exudates)* Venous beading* Extensive hemorrhage* Intraretinal intravascular abnormalities (IRMA)