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: Pediatrics
[{'content': 'All of the following are biomarkers of kidney function except \nSelect and explain. \nA. NGAL, B. Cystatin - C, C. KIM - 2, D. IL - 18', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Biomarkers of kidney function :\nCystatin - C.\nNGAL\xa0⇒ Neutrophil Gelatinase associated lipocalcin.\nKIM - 1 ⇒ Kidney injury molecule - 1.\nIL - 18\xa0⇒ Interleukin - 18.', 'role': 'assistant'}]