Pharmacology A drug X is secreted through renal tubules, tubular secretion of this drug can be confirmed if renal clearance of drug X is: A More than the GFR B Equal to the GFR C Less than the GFR D More than volume of distribution 💡 Explanation A drug X is secreted through renal tubules, tubular secretion of this drug can be confirmed if renal clearance of drug X is: ✓ Correct Answer: A. More than the GFR