This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': 'All are hypercoagulable states, except ? \nSelect and explain. \nA. Protein C resistance, B. Protein S deficiency, C. Antiphospholipid antibody, D. None', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'None' o All are hypercoagulable states.", 'role': 'assistant'}]