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
[{'content': 'Preaccelerin is ? \nSelect and explain. \nA. Eater II, B. Facter V, C. Facter VII, D. Facter X', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Facter VII", 'role': 'assistant'}]