This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Surgery
All are predisposing causes of cerebral venous thrombosis except: 
Select and explain. 
A. Hypotension, B. Oral contraceptives, C. Pregnancy, D. Aplastic anemia
D: Aplastic anemia
Answer: D: Aplastic anemia 
Explanation: Ans. (d) Aplastic anemia* Hypercoagulable states are associated with Cerebral vein thrombosis* Aplastic anemia is not associated with hypercoagulability