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
Cause of sudden loss of vision in alcoholic pancreatitis is - 
Select and explain. 
A. Central retinal artery obstruction, B. Acute congestive glaucoma, C. Purstchner retinopathy, D. Sudden alcohol withdrawl
C: Purstchner retinopathy
Answer: C: Purstchner retinopathy 
Explanation: None