The exterior angle of a triangle is $75^{\circ}$ and its interior opposite angles are equal. The measure of each of these equal angles is

Question

$\begin{array}{1 1} (a)\; 105^{\circ} \\ (b)\; 50.5^{\circ} \\ (c)\; 52^{\circ} \\ (d)\; 37.5^{\circ} \end{array}$