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
Vwf factor is produced by: 
Select and explain. 
A. Platelets, B. Endothelial cells, C. Neutrophils, D. Monocytes
B: Endothelial cells
Answer: B: Endothelial cells 
Explanation: Ans: B. Endothelial cellsVon willebrand factor (vWF)* This is the larger component.* It is produced by endothelial cells (main source) and megakaryocytes.It has two major functions ?* Helps in platelets adhesion by interacting with platelet membrane glycoprotein ib-IX.* Stabilizes factor VIllc.