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
Which of the following does not pass through normal kidneys? 
Select and explain. 
A. Albumin, B. IgG, C. Beta globulin, D. Lysozyme
A: Albumin
Answer: A: Albumin 
Explanation: Albumin is not excreted and beta globulin is excreted because circulating albumin is negatively charged.