The angles of a triangle are in the ratio 3 : 4 : 5.Find the smallest angle in degrees and the greatest angle in radians

Question

$\begin{array}{1 1}(a)\;15^{\large\circ}&(b)\;45^{\large\circ},\large\frac{5\pi}{2}\\(c)\;75^{\large\circ},\large\frac{\pi}{2}&(d)\;None\;of\;these\end{array}$