Final answer:
The glossopharyngeal (IX) nerve is functionally classified as Mixed, as it consists of both sensory and motor fibers.
Step-by-step explanation:
The glossopharyngeal (IX) nerve is functionally classified as a) Mixed. It is a cranial nerve that consists of both sensory and motor fibers. It carries gustatory (taste) information from the posterior third of the tongue, as well as general sensations from the pharyngeal walls. Additionally, it plays a role in controlling salivary glands and the gag reflex.