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: Pharmacology
[{'content': 'Probenecid \nSelect and explain. \nA. Does not decrease the renal excretion of pencillin, B. Does decrease the renal excretion of pencillin, C. Has no effect, D. At high doses increases and at low doses decreases', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Does decrease the renal excretion of pencillin', 'role': 'assistant'}]