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: Pathology
Which of the following statement is not true about Von willebrand disease? 
Select and explain. 
A. VWF is synthesized by endothelial cells and megakonjocytes, B. VWF maybe located in the plasma and subendothelial tissue, C. VWF causes platelet adhesion and prevents degradation of factor VIII in plasma, D. Deficiency of VWF causes prolonged prothrombin time
D: Deficiency of VWF causes prolonged prothrombin time
Answer: D: Deficiency of VWF causes prolonged prothrombin time 
Explanation: Laboratory findings of Von willebrand disease

Platelet count : Normal 
Bleeding time : Prolonged
Clotting time : Prolonged
Prothrombin time : Normal