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: Physiology
Plasma thromboplastin antecedent is: 
Select and explain. 
A. Anti hemophilic — A factor, B. Anti hemophilic — B factor, C. Anti hemophilic —C factor, D. Anti hemophilic — F factor
C: Anti hemophilic —C factor
Answer: C: Anti hemophilic —C factor 
Explanation: None