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
[{'content': 'The substance that is present in both serum and plasma is: \nSelect and explain. \nA. Fibrinogen, B. Factor VII, C. Factor V, D. Factor II', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 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.', 'role': 'assistant'}]