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': 'Not a manifestation of non proliferative diabetic retinopathy \nSelect and explain. \nA. Drusens, B. Hard exudates, C. Dot blot haemorrhage, D. Cotton wool spots', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Drusens are pathognomic of dry ARMD and not diabetic retinopathy Manifestations OF non proliferative diabetic retinopathy - a. Microaneurysm: Saccular outpouchings of the vessel wall due to loss of pericytes b. Dot blot haemorrhage: Due to break of wall of microaneurysm in the deep layers c. Superficial haemorrhage: haemorrhage in superficial layers d. Hard exudates: Lipofuschin deposits in inner layer e. Cotton wool spots: NFL Infarction f. Intraretinal microvascular anomalies: abnormal communicating vessels between aeries and the veins g. Venous bleeding', 'role': 'assistant'}]