
Answer:
(Choice B)
B
A sphere with diameter 5 units
Explanation:
When 2D images are rotated about a line or an axis, it always results in the formation of 3D images.
From the question above, our 2D image is the semi circle with Diameter 5 units, when it is rotated along the line m,
We would get the 3D image of sphere with a diameter of 5 units.
Therefore, Choice B is the correct option.
Please find attached to this answer the diagram that show us the rotation of the semi circle.