2805. Which of the following is important in renal excretion of hydrogen ion ? September 27, 2025 by Admin A. Combining H+ with Cl- to form Hcl B. Combining H+ and HCO3- via enzyme carbonic anhydrase C. Trapping H+ by acetate D. Trapping H+ by NH3+ ✅ The correct answer is option D. Trapping H+ by NH3+.