An object approaches a convex lens from distance with a uniform speed of 3 m/s and stops at the focus. The image

moves away from the lens with a non uniform acceleration

The correct answer is Option (3) → moves away from the lens with a non uniform acceleration

The image does not move with constant speed or uniform acceleration because the relationship between object position and image position is non-linear.

The closer the object gets to the focus, the faster the images move away, which indicates non-uniform acceleration.