# If the concentration of $OH^-$ ions in the reaction $Fe(OH)_3 (s) \leftrightharpoons Fe^{3+}(aq)+3\: OH^-(aq)$ is decreased by $\large\frac{1}{4}$ times, then equilibrium concentration of $Fe^{3+}$ will increase by :

$\begin {array} {1 1} (1)\;4\: times & \quad (2)\;8\: times \\ (3)\;16\: times & \quad (4)\;64\: times \end {array}$