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 of the following causes excessive bleeding during tooth extraction except: 
Select and explain. 
A. Haemophilia - A, B. Haemophilia - B, C. Anti thrombin — III deficiency, D. Von-willebrand disease
C: Anti thrombin — III deficiency
Answer: C: Anti thrombin — III deficiency 
Explanation: None