In the figure $BA ||ED$ and $BC || EF$ <br> Then $\angle{ABC} + \angle{DEF} $ = <br>

Question

$\begin{array}{1 1} (a)\;90^{\circ} \\ (b)\; 120^{\circ} \\ (c)\; 180^{\circ} \\ (d)\; \text{none of the above} \end{array}$