This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: vitamins, Subject name: Biochemistry
[{'content': 'All the following clotting factors are dependent on vitamin K for their activity Except \nSelect and explain. \nA. II, B. V, C. VII, D. IX', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Factors VII, IX, and X, and proteins C and S, are dependent on Vitamin K. Harper 30th edition pg:555', 'role': 'assistant'}]