Calculate the hydrolysis constant $(K_h)$ for a salt containing $NO_2^-$. Given that the dissociation constant $(K_a)$ for $HNO_2$ is $4.5 \times 10^{-4}$ and the ionic product of water $(K_w)$ is $1.0 \times 10^{-14}$.
- A$2.22 \times 10^{-11}$
- B$2.02 \times 10^{-10}$
- C$4.33 \times 10^{-12}$
- D$3.03 \times 10^{-11}$
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