This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Physiology
[{'content': 'Protein C activation causes \nSelect and explain. \nA. Promotion of clothing, B. Inactivation of factor II, C. Activation of factor X, D. Inactivation of factor V', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Binding of thrombin with thrombomodulin slow the clotting process by removing thrombin, the thrombomodulin-thrombin complex also activates a plasma protein, protein C, that actssnanticoagulant by inactivating activated Factors V and VIII.Ref: Guyton and Hall textbook of medical physiology 13th edition. Page: 489', 'role': 'assistant'}]