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: Surgery
The deficiency of all of the following factors increases the incidence of thrombus formation except - 
Select and explain. 
A. Lipoprotein A, B. Protein - C, C. Anti - thrombin III, D. Protein - S
A: Lipoprotein A
Answer: A: Lipoprotein A 
Explanation: None