In the figure given below sides $QP$ and $RQ$ of $\Delta PQR$ are produced to point $S$ and $T$. If $\angle PQT = 110^{\circ}$ and $\angle SPR = 135^{\circ}$, then $\angle {PRQ} $ is

Question

$\begin{array}{1 1} (a)\; 45^{\circ} \\ (b)\; 50^{\circ} \\ (c)\; 65^{\circ} \\ (d) \;70^{\circ} \end{array} $