Is the optic the first cranial nerve?

I- Olefactory (sensory): smell. II- Optic (sensory): vision.

The CN X is the vagus also it is called pneumogastric nerve,the Wanderer or sometimes the Rambler

Cranial nerve 4 (IV) is the trochlear nerve.

It is a cranial nerve.

Because somebody would ask why it wasn't cranial nerves instead of brainial nerves.