Which of these statements is true ?

Options

A. NaCl is transported by the ascending limb of Henle's loop which is exchanged with the descending limb of vasa recta. NaCl is returned to the interstitium by the ascending portion of vasa recta.
B. NaCl is transported by the descending limb of Henle's loop which is exchanged with the ascending limb of vasa recta. NaCl is returned to the interstitium by the descending portion of vasa recta.
C. NaCl is transported by the ascending limb of Henle's loop which is exchanged with the ascending limb of vasa recta. NaCl is returned to the interstitium by the ascending portion of vasa recta.
D. NaCl is transported by the descending limb of Henle's loop which is exchanged with the descending limb of vasa recta. NaCl is returned to the interstitium by the descending portion of vasa recta.

Answer

A