Final answer:
True, the rootlets of cranial nerve XII (the hypoglossal nerve) emerge between the olive and the medullary pyramid.
Step-by-step explanation:
The statement that the rootlets of CN XII exit between the olive and medullary pyramid is True. Cranial nerve XII, also known as the hypoglossal nerve, is responsible for motor control of the tongue. It originates in the hypoglossal nucleus in the medulla oblongata of the brainstem. Its rootlets indeed emerge between the olive, which is an inferior olivary nucleus involved in sensory processing and motor learning, and the medullary pyramid, which consists of the corticospinal tract carrying motor signals from the cerebral cortex to the spinal cord.