This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Medicine
[{'content': 'Cryoprecipitate contains all except -( \nSelect and explain. \nA. Factor VIII, B. Factor IX, C. Fibrinogen, D. VWF', 'role': 'user'}, {'content': "Answer: B \nExplanation: Cryoprecipitate contains fibrinogen & coagulation factor concentrated from plasma by controlled thawing.10-20mL pack contains fibrinogen 150-300mg, factor VIII 80-120 U, von Willebrand factor 80-120U. Reference :Davidson's principle & practice of medicine 22nd edition pg no 1012.", 'role': 'assistant'}]