An object 60 cm from a lens gives a virtual image at a distance of 20 cm in front of the lens. Is this lens converging or diverging ?

Question

$\begin{array}{1 1} (a)\; \text{converging} \\ (b)\; \text{diverging} \\ (c)\; \text{neither converging nor diverging} \\ (d)\; \text{cannot be determined} \end{array}$