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 protects factor? \nSelect and explain. \nA. II, B. V, C. VIII, D. X', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. (c) VIII(Ref: Wintrobe's 13th/pg 1389)vWF is required for normal platelet adhesion, and also acts as a carrier of factor VIII in the plasma", 'role': 'assistant'}]