Aqueous solutions of $\mathrm{HNO}_3, \mathrm{KOH}, \mathrm{CH}_3 \mathrm{COOH}$, and $\mathrm{CH}_3 \mathrm{COONa}$ of identical concentrations are provided. The pair (s) of solutions which form a buffer upon mixing is(are)
Select ALL correct options:
A
$\mathrm{HNO}_3$ and $\mathrm{CH}_3 \mathrm{COOH}$
B
KOH and $\mathrm{CH}_3 \mathrm{COONa}$
C
$\mathrm{HNO}_3$ and $\mathrm{CH}_3 \mathrm{COONa}$
D
$\mathrm{CH}_3 \mathrm{COOH}$ and $\mathrm{CH}_3 \mathrm{COONa}$
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