A Solution with a POH of 6 $\times$ 10^-7 M $\times$ 10^-6 M

A solution with a pOH of 6.92 has an [OH^-] of __________

A) 1.2 $\times$ 10^-7 M.
B) 9.2 $\times$ 10^-6 M.
C) 6.8 $\times$ 10^-6 M.
D) 7.1 M.
E) 6.9 M.