The inverse of the function $f(x) =\large\frax{(ax-b)}{(cx-a)}$$ x \neq \large\frac{a}{c}$ is equal to

Question

$\begin{array}{1 1} \frac{(ax-b)}{(cx-a)} \\ \frac{(cx-a)}{(ax-b)} \\ \frac{(cx-b)}{(bx-a)} \\ \frac{(bx-a)}{(cx-b)} \end{array} $