This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Clotting system, Subject name: Pathology
[{'content': 'Which of the coagulation factor is least affected in a patient with vitamin K deficiency? \nSelect and explain. \nA. Factor 10, B. Factor 9, C. Factor 8, D. Factor2', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Factor VIII Patient with vitamin K deficiency will have mostly involvement of dependent clotting factors. I.e. Factors II, VII, IX & X', 'role': 'assistant'}]