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

$\begin{array}{1 1}(A)\;45^{\large\circ},\large\frac{5\pi}{12}\normalsize radians\\(B)\;60^{\large\circ},\large\frac{4\pi}{10}\normalsize radians\\(C)\;75^{\large\circ},\large\frac{5\pi}{12}\normalsize radians\\(D)\;60^{\large\circ},\large\frac{7\pi}{12}\normalsize radians\end{array}$