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
Exudative retinopathy in hypeensive is due to 
Select and explain. 
A. Co-arctation of aoa, B. Type I takaysu's aeritis, C. Renal aery stenosis, D. Diabetic atherosclerosis
C: Renal aery stenosis
Answer: C: Renal aery stenosis 
Explanation: C i.e. Renal aery stenosis Renal retinopathy describes the retinal changes seen in chronic renal failure. These may mimic a hypeensive retinopathy of grade III or IV but the tendency to exudates formation is marked paicularly at the macula.Q Severe hypeension in eclampsia may precipitate a florid retinopathy of grade IV often with exudative retinal detachment. This detachment clears rapidly with the termination of pregnancy when the hypeension is under control.