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: Medicine
Puscher's retinopathy in acute pancreatitis is due to which of the following? 
Select and explain. 
A. Occlusion of the posterior retinal aery with aggregated granulocytes, B. Occlusion of ciliary aery with exudation, C. Central retinal aery occlusion with cotton wool spots and hemorrhage, D. Inflammatory exudates in the retinal vein
A: Occlusion of the posterior retinal aery with aggregated granulocytes
Answer: A: Occlusion of the posterior retinal aery with aggregated granulocytes 
Explanation: Puscher's retinopathy a sudden and severe loss of vision in a patient with acute pancreatitis. It is due to occlusion of the posterior retinal aery with aggregated granulocytes. Reference: Harrisons Principles of Internal Medicine, 18th Edition, Page 2642