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: Unknown
Earliest sign in papilledema is - 
Select and explain. 
A. Blurring of disc margins, B. Venous engorgement, C. Hyperemia of disc, D. Cotton wool spots
B: Venous engorgement
Answer: B: Venous engorgement 
Explanation: Ans- B Venous engorgement Please note -latest studies say Venous engorgement is seen earlier than The blurring of disc margins.