Distinguish between smooth endoplasmic reticulum and rough endoplasmic reticulum.

O Rough endoplasmic reticulum has ribosomes attached to its surface.
O Smooth endoplasmic reticulum has vacuoles attached to its surface.
O Smooth endoplasmic reticulum has ribosomes attached to its surface.
O Rough endoplasmic reticulum has vacuoles attached to its surface.