The angle of elevation of the sun , when the length of the shadow of a verticle pole is equal to its height is _____

Question

$\begin{array}{1 1}(A) \; 30^{\circ} \\(B)\; 45^{\circ} \\(C)\;60^{\circ} \\(D)\;none\;of\;the \;above\end{array}$