This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood Physiology, Subject name: Physiology
The substance that is present in both serum and plasma is: 
Select and explain. 
A. Fibrinogen, B. Factor VII, C. Factor V, D. Factor II
B: Factor VII
Answer: B: Factor VII 
Explanation: Factor VII or stable factor - Is present in plasma and is also stable in serum ("Noble factor"). It is essential for generation of Tissue Thromboplastin. Its congenital deficiency rarely gives rise to coagulation defects.