For a glass prism $(\mu=\sqrt 3)$ the angle of minimum deviation is equal to the angle of the prism . Find the angle of the prism .

Question

$\begin{array}{1 1} A= 60^{\circ} \\ A= 30^{\circ} \\ A= 120^{\circ } \\ A= 45^{\circ} \end{array} $