Which of the following solution will have pH = 13 on assuming complete dissociation 

$\left(\text{A}\right)\left[{\text{OH}}^{-}\right]{\text{\hspace{0.17em}=\hspace{0.17em}10}}^{\text{-1}}$

$\therefore {\text{\hspace{0.17em}p}}^{\text{H}}\text{\hspace{0.17em}=\hspace{0.17em}13}$

$\left(\text{B}\right){\left[\text{OH}\right]}^{-}\text{\hspace{0.17em}=\hspace{0.17em}}\frac{\text{0.56}}{\text{56}}\text{\hspace{0.17em}×\hspace{0.17em}}\frac{\text{1000}}{\text{100}}{\text{\hspace{0.17em}=\hspace{0.17em}10}}^{\text{-1}}\Rightarrow {\text{\hspace{0.17em}p}}^{\text{OH}}{\text{\hspace{0.17em}=\hspace{0.17em}1\hspace{0.17em}P}}^{\text{H}}\text{\hspace{0.17em}=\hspace{0.17em}13}$

$\left(\text{C}\right)\left[{\text{OH}}^{-}\right]\text{\hspace{0.17em}=\hspace{0.17em}}\frac{\text{4}}{\text{40}}\text{\hspace{0.17em}×\hspace{0.17em}}\frac{\text{1}}{\text{0.5}}\text{\hspace{0.17em}=\hspace{0.17em}0.2\hspace{0.17em}M}$

$\left(\text{D}\right)\left[{\text{OH}}^{-}\right]{\text{\hspace{0.17em}=\hspace{0.17em}M\hspace{0.17em}×\hspace{0.17em}n.\hspace{0.17em}factor\hspace{0.17em}×\hspace{0.17em}V\hspace{0.17em}=\hspace{0.17em}0.05\hspace{0.17em}×\hspace{0.17em}2\hspace{0.17em}=\hspace{0.17em}10}}^{\text{-1}}$

$\therefore {\text{\hspace{0.17em}p}}^{\text{H}}\text{\hspace{0.17em}=\hspace{0.17em}13}$