This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidneys and Body Fluids, Subject name: Physiology
[{'content': 'Which of the following product is primarily filtered with little secretion or re - absorption in renal tubules? \nSelect and explain. \nA. Sodium, B. Creatinine, C. Glucose, D. Amino acids', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Creatinine(Ref: Ganong, 25th ed/p.679)Substances like inulin and creatinine are useful to estimate GFR because they are freely filtered, neither resorbed, nor secreted', 'role': 'assistant'}]