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': 'Which of the following is not involved in intrinsic pathway? \nSelect and explain. \nA. Factor XII, B. Factor XI, C. Factor IX, D. Factor VII', 'role': 'user'}, {'content': "Answer: D \nExplanation: Factor VII is required for the activation of Factor X in extrinsic pathway Ref: Ganong's Review of Medical Physiology Twenty-Third Edition Page No:533", 'role': 'assistant'}]