Find the angle between the lines whose slope are $\large\frac{3}{2}$ and 7?

Question

$\begin{array}{1 1}(a)\;\theta=\tan^{-1}\large\frac{11}{24}&(b)\;\theta=\tan^{-1}\large\frac{11}{23}\\(c)\;\theta=\tan^{-1}\large\frac{12}{23}&(d)\;\theta=\tan^{-1}\large\frac{10}{23}\end{array}$