2.5 mL of $$\frac{2}{5}$$ M weak monoacidic base $$(K_b = 1 \times 10^{-12}$$ at $$25^\circ C)$$ is titrated with $$\frac{2}{15}$$ M HCl in water at $$25^\circ C$$. The concentration of $$H^{+}$$ at equivalence point is $$(K_w = 1 \times 10^{-14}$$ at $$25^\circ C)$$

A

$$3.7 \times 10^{-13}$$ M

B

$$3.2 \times 10^{-7}$$ M

C

$$3.2 \times 10^{-2}$$ M

D

$$2.7 \times 10^{-2}$$ M