Which one of the following statements with regard to the excretion by the human kidneys is correct?

A comparison of the volume of the filtrate formed per day (180 litres per day) with that of the urine released (1.5 litres), suggest that nearly 99 per cent of the filtrate has to be reabsorbed by the renal tubules.Descending limb of Loop of Henle is permeable to water.  Distal convoluted tubule is capable of reabsorbing HCO3−.  Ascending limb of loop of Henle is permeable to electrolytes.