Inulin clearance is most similar to the measurement of which renal function?

Explanation

Inulin clearance is considered the gold standard for estimating the glomerular filtration rate (GFR) because it is freely filtered and neither secreted nor reabsorbed by the kidneys. Renal plasma flow is measured by PAH clearance, while creatinine clearance is an approximate estimate of GFR but less accurate due to tubular secretion.