What Is the PH of a 0 $\times$ 10^-4)at 25^oC? (K_w = 1

Multiple Choice

What is the pH of a 0.11 M solution of methylamine (CH₃NH₂,K_b = 4.4 $\times$ 10^-4) at 25^oC? (K_w = 1.01 $\times$ 10^-14)

A) 5.80
B) 0.96
C) 11.83
D) 13.04
E) 2.17