In the figure below $OP \parallel RS, \angle OPQ=110^{\circ}$ and $\angle QRS=130^{\circ}$ , then $\angle PQR$ is

Question

$\begin{array}{1 1} (a)\;40^{\circ} \\ (b)\;50^{\circ} \\ (c)\;60^{\circ} \\(d)\;70^{\circ} \end{array}$