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': 'vWF is useful in: \nSelect and explain. \nA. Platelet adhesion, B. Platelet aggregation, C. Clot formation, D. Fibrinolysis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Platelet adhesion(Ref: Robbins 9th/pg 661)2 major functions of vWF are: Platelet adhesion via GpIb/IX and Stabilizes factor VIII in circulation', 'role': 'assistant'}]