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
[{'content': 'Which of the following is not a High Risk Characteristic in proliferative diabetic retinopathy \nSelect and explain. \nA. NVD >= 1/3 - 1/2 disc area, B. NVD + Vitreous or Preretinal haemorrhage, C. NVE >= 1/2 disc area and Preretinal or Vitreous haemorrhage, D. NVD + Clinically signifacnt macular edema', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Proliferative Diabetic Retinopathy Early PDR- Presence of new vessels High risk PDR NVD >= 1/3 - 1/2 disc area or NVD and Vitreous or Preretinal haemorrhage or NVE >= 1/2 disc area and Preretinal or Vitreous haemorrhage', 'role': 'assistant'}]