When $C_6H_5NH_3^+ Cl^-$ salt is dissolved in water,it undergoes hydrolysis. Find the equilibrium constant of the hydrolysis reaction if the ionization constant of the weak base is $10^{-4}$.

  • A
    $10^{-4}$
  • B
    $2 \times 10^{-4}$
  • C
    $10^{-10}$
  • D
    $2 \times 10^{-10}$

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