_____________ (D) is transported by the ______________ (E) of _________ (J) which is exchanged with the ______________ (G) of _____________ (I). ____________ (D) is returned to the interstitium by the ________________ (H) of ____________ (I).

Question

( a ) urea, descending limb of Henle’s loop, ascending limb of vasa recta; urea, descending portion of vasa recta
( b ) NaCl, ascending limb of Henle’s loop, descending limb of vasa recta; NaCl, ascending portion of vasa recta
( c ) urea, descending limb of vasa recta, ascending limb of Henle’s loop; urea, descending portion of vasa recta
( d ) NaCl, ascending limb of vasa recta, descending limb of Henle’s loop; NaCl, ascending portion of Henle's loop