This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Physiology
Factor X is 
Select and explain. 
A. Hageman factor, B. Stua-Prower factor, C. Christmas factor, D. Tissue factor
B: Stua-Prower factor
Answer: B: Stua-Prower factor 
Explanation: Factor X is also called as Stua-Prower factor Ref: Ganong 25th ed/page 566