The dissociation constant of certain weak acid HA is $1 \times 10^{-4}$. The equilibrium constant for its reaction with strong base BOH is

Question

(a) $1 \times 10^{-4}$

(b) $1 \times 10^{-10}$

(c) $\infty$

(d) $1 \times 10^{10}$