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
Haemostasis depends upon all the following, EXCEPT 
Select and explain. 
A. Calcium, B. Prothrombin, C. Vitamin B, D. Vitamin K
C: Vitamin B
Answer: C: Vitamin B 
Explanation: None