Solid Calcium Hydroxide Is Dissolved in Water Until the PH $\times$

Multiple Choice

Solid calcium hydroxide is dissolved in water until the pH of the solution is 11.44.The hydroxide ion concentration [OH^-] of the solution is:

A) 3.6 $\times$ 10^-12 M
B) 5.5 $\times$ 10^-3 M
C) 2.8 $\times$ 10^-3 M
D) 1.4 $\times$ 10^-3 M
E) none of these