What is the limbic system?

Which part of the human brain is the most highly developed?

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 $iii$.

Consider the following statements regarding the human brain:
$1.$ The cerebrum has a highly convoluted surface,which provides space for more neurons.
$2.$ The medulla oblongata is connected to the spinal cord.
$3.$ The medulla oblongata contains centers for respiration,cardiovascular reflexes,and gastric secretions.
Which of the above statements are correct?

$IV, V$ and $IX$ cranial nerves are

Which part of the mammalian brain controls muscular coordination?