An injury to the $Diencephalon$ may result in:

If cranial nerves are $12$ pairs, then spinal nerves are: (in $pairs$)

Sub-arachnoid space is found in:

The $CNS$ is primarily composed of:

The tract of nerve fibres which connects the cerebral hemispheres is:

Read the following statements:
$(a)$ The peripheral nervous system is divided into the somatic nervous system and the autonomic nervous system.
$(b)$ The central nervous system includes the brain and the spinal cord.
$(c)$ Afferent nerve fibers transmit impulses from the brain to the sensory organs.
How many of the above statements are incorrect?