This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Physiology
Coagulation factor VII is 
Select and explain. 
A. Thromboplstin, B. Accalerin, C. Proconvein, D. Antihaemophilic factor
C: Proconvein
Answer: C: Proconvein 
Explanation: Factor VII (EC 3.4.21.21, blood-coagulation factor VIIa, activated blood coagulation factor VII, formerly known as proconvein) is one of the proteins that cause blood to clot in the coagulation cascade. It is an enzyme of the serine protease class. Ref: guyton and hall textbook of medical physiology 12 edition page number:146,147,148