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
[{'content': 'Platelet adhesion to vessel wall is due to? \nSelect and explain. \nA. Factor IX, B. Fibrinogen, C. vWF, D. Fibronectin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 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.', 'role': 'assistant'}]