Given: $,K_a$ of $HF=6\mathrm{.}8{10}^{-4}$

$K_a$ of $N{H}_4^{+}=6\mathrm{.}3{10}^{-10}$

$K_a$ of $HCN=4\mathrm{.}9{10}^{-10}$

According to the given data above, a $0\mathrm{.}10M$ solution of which of the following would have the highest $pH?$

NaF $,$NaCN, $N{H}_{4}Cl,N{H}_{4}F,N{H}_{4}CN$

The answer should be NaCN but I want clear information using the information given