The correct option of this question will be** (C).**

**Solution —**

The gravitational force is a conservative force, so the work done by it is independent of path. Hence in both cases

$\frac{1}{2} m u^{2}=m g h$

where $h$ is the height of the inclined plane. or $u=\sqrt{2 g h}$

Clearly, it is independent of mass.

$\mathrm{So}, u_{1}=u_{2}$