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': 'procoagulant not normally circulating in the plasma is : \nSelect and explain. \nA. Prothrombin, B. Fibrinogen, C. Antithemophilic factor, D. None of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. None Plasma - is fluid poion of blood, containing an immense number of ions, inorganic molecules & organic molecules that are in transit to various pa of the body . Serum - If whole blood is allowed to clot and the clot is removed , the remaining fluid is serum. - It has same composition as plasma except its fibrinogen, factor 2,5,& 8 have been removed - It has high serotonin content d/t breakdown of platelets during clotting.', 'role': 'assistant'}]