Substance X is freely filtered by the glomerulus and is not reabsorbed, nor secreted nor metabolized.If - serum x concentration = 0.020 mg/mlrenal artery x concentration = 0.020 mg/mlrenal vein x concentration = 0.002 mg/mlurine x concentration = 14 mg/mlurine flow = 54 ml/hrlymphatic x concentration = 0.00001 mg/mlhaematocrit = 0.45The GFR is:

Substance X is freely filtered by the glomerulus and is not reabsorbed

1.	Substance X is freely filtered by the glomerulus and is not reabsorbed, nor secreted nor metabolized.If - serum x concentration = 0.020 mg/mlrenal artery x concentration = 0.020 mg/mlrenal vein x concentration = 0.002 mg/mlurine x concentration = 14 mg/mlurine flow = 54 ml/hrlymphatic x concentration = 0.00001 mg/mlhaematocrit = 0.45The GFR is:
A.	10.5 ml/min
B.	700 ml/min
C.	11.7 ml/min
D.	630 ml/min
E.	778 ml/min
Answer» E. 778 ml/min