Which of the following options has the correct pair of nephron parts that maintain pH and ionic balance of blood?

Answer: BSolution: DCT maintains the pH and ionic balance in the blood by reabsorption of $N{a}^{+}$, water, $HC{O}_3^{-}$ and selective secretion of $H^{+},K^{+}$ and $N{H}_3$. Collecting duct plays a role in the maintenance of pH and ionic balance of bloody by reabsorption of water, and elective secretion of $H^{+}$ and $K^{+}$ ions.