Calculate the hydrolysis constant $(K_h)$ of the salt containing $NO_2^-$. Given the $K_a$ for $HNO_2 = 4.5 \times 10^{-10}$.

• A
  $2.22 \times 10^{-5}$
• B
  $2.02 \times 10^{5}$
• C
  $4.33 \times 10^{4}$
• D
  $3.03 \times 10^{-5}$