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': 'Which of the following does not pass through normal kidneys? \nSelect and explain. \nA. Albumin, B. IgG, C. Beta globulin, D. Lysozyme', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Albumin is not excreted and beta globulin is excreted because circulating albumin is negatively charged.', 'role': 'assistant'}]