Which of the following aqueous mixtures will function as buffer $?$

$($A$)$ NaCl$+$NaOH

$($B$)$ Borax $+$ Boric Acid

$($C$)N{a}_{2}HP{O}_4+Na{H}_{2}P{O}_4$

$($D$)N{H}_{4}Cl+N{H}_{4}OH$

$($A$)ClC{H}_2\frac{C}{O}ON{a}^{+}$

$($B$)CHB{r}_3$

$($C$)CHClB{r}_2$

$($D$)$ lain Clearly $)$