Out of the following which is a 3-D figure?

A 3-D figure is defined as the figure which can be specified in all three dimensional axis that is x-axis, y-axis and z-axis.

A 2-D figure can be represented only on a plane.

From the available option Sphere is the only figure can be visualized in space.

All the remaining figures in the option are 2-D figures.

So the correct answer is B.