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: Biochemistry
[{'content': 'Which of the following is present in the plasma but absent in the serum? \nSelect and explain. \nA. Albumin, B. Globulin, C. Lecithin, D. Fibrinogen', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]