An object approaches a convergent lens from the left of the lens with a uniform speed 5 m/s and stops at the focus . The image

Question

$\begin{array}{1 1} \text{moves away from the lens with uniform speed 5m/s} \\ \text{moves away from the lens with uniform acceleration } \\ \text{moves away from the lens with non-uniform acceleration } \\ \text{moves towards the lens, with non-uniform acceleration } \end{array}$