Consider the Titration of 100 $\times$ 10^-10)with 0

Consider the titration of 100.0 mL of 0.250 M aniline (K_b = 3.8 $\times$ 10^-10) with 0.500 M HCl.For calculating the volume of HCl required to reach a pH of 8.0,which of the following expressions is correct? (x = volume in mL of HCl required to reach a pH of 8.0)

A) = [aniline]
B) [H⁺] = x
C) = [aniline]
D) = [aniline]
E) none of these