IN DISTAL CONVOLUTED TUBULE OF THE NEPHRONS .......1] NA REABSORPTION REQUIRES ENERGY 2] SECRETION OF K IONS DOES NOT REQUIRE ENERGY 3] WATER REABSORPTION REQUIRES ENERGY 4] AMMONIA IS SECRETED
Option 1 is right.
In distal convoluted tubes of nephrons, Sodium reabsorption requires energy.