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
Which of the following clotting factors are common in both extrinsic and intrinsic pathway: 
Select and explain. 
A. Factor 5,9,10., B. Factor 5,10., C. Factor 5,9,10,11., D. None.
B: Factor 5,10.
Answer: B: Factor 5,10. 
Explanation: None