This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bleeding Disorders, Subject name: Pathology
Platelet adhesion to vessel wall is due to? 
Select and explain. 
A. Factor IX, B. Fibrinogen, C. vWF, D. Fibronectin
C: vWF
Answer: C: vWF 
Explanation: Ans. (c) vWF(Ref: Robbins 9th/pg 660; 8th/pg 670)Platelet adhesion to vessel wall is due to vWF on endothelium and GpIb/IX receptors on the surface of platelets.