Identify the structure that forms cranial nerve i.

filaments of the olfactory nerve

Explanation:

The cranial nerves are those that are linked to the brain. Most of these nerves leave the region called the brainstem.

The olfactory nerve is exclusively sensitive and is related to the conduction of olfactory impulses, ie our ability to perceive smells. The terminations of this nerve are located in the nasal mucosa, it is also possible to see filaments of this nerve in some regions.

i think it's the first one because doctors aren't the ones who get rid of the old needles. most of them time it's not even doctors who give you shots, it's nurses.