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
What is the sequence of clotting factors in coagulation pathway? 
Select and explain. 
A. XII, XIII, X, XI, B. XIII, XII, XI, X, C. XII, XI, IX, X, D. X, XIII, XII, XI
C: XII, XI, IX, X
Answer: C: XII, XI, IX, X 
Explanation: Ans. C. XII, XI, IX, X