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
[{'content': 'Which of the following is responsible for adhesion of plate!lets to the vessel IN all?(.4//MS May 2015, November 2013 \nSelect and explain. \nA. Factor IX, B. Von Willebrand factor, C. Fibrinogen, D. Fibronectin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans: B. Von Willebrand factor(Ref. Robbins 9/e pill), 660 & Robbins 9/e p116Von-Willebrand factor:Product of normal endothelial cells.An essential cofactor for platelet binding to matrix elements (adhesion of platelets to vessel wall).Events:Endothelial injury allows platelets to contact underlying extracellular matrix a subsequent adhesion occurs through interactions with von Willebrand factor (vWF).', 'role': 'assistant'}]