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
Not a vit. K dependent factor: 
Select and explain. 
A. II, B. VII, C. IX, D. XII
B: VII
Answer: B: VII 
Explanation: D i.e. XII- Vit K dependent factors: factor II (prothrombin), VII, IX, X protein C and SQ- Vit K is a necessary cofactor for the enzyme that catalyzes carboxylation of glutamic residue in these proteins, necessary for their action- PT is first to be prolonged in Vit K deficiency.Q ( factor VII has sho t1/2)