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': 'What is implied, if a drug has more renal clearance than the GFR \nSelect and explain. \nA. Drug is reabsorbed in the tubules, B. Drug is secreted in the tubules, C. Drug is excreted in bile, D. Drug is neither secreted, nor reabsorbed', 'role': 'user'}, {'content': 'Answer: B \nExplanation: If clearance of a substance is greater than GFR, then tubular secretion must be present.', 'role': 'assistant'}]