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: Medicine
All of the following conditions predispose to thrombosis except: 
Select and explain. 
A. Paroxysmal nocturnal hemoglobinuria, B. Homocystinurea, C. Hypomagnesemia, D. Behcets syndrome
C: Hypomagnesemia
Answer: C: Hypomagnesemia 
Explanation: Answer is C (Hypomagnesemia): All conditions other than hypmagnesemia are known predisposing causes of thrombosis.