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
All are hypercoagulable states, except ? 
Select and explain. 
A. Protein C resistance, B. Protein S deficiency, C. Antiphospholipid antibody, D. None
D: None
Answer: D: None 
Explanation: Ans. is 'None' o All are hypercoagulable states.