What is the number of spinal nerves in a rabbit (in $pairs$)?

Cranial nerve $i$ is also called pneumogastric, $ii$ is also called vestibulocochlear, and $iii$ is also called Dentist's Nerve. Identify the correct names for $i$, $ii$, and $iii$.

The canal passing through the midbrain is called

In the dual innervation of an organ:

The cerebrum wraps around a structure called $......,$ which is a major coordinating centre for sensory and motor signaling.

The link between paracoel and diocoel is through