The $CNS$ is primarily composed of:

The outermost covering of the brain is called:

Given below are two statements:
Statement $I$: Limbic system is responsible for motivational drives and memory.
Statement $II$: Reticular activating system of diencephalon transmits all sensory impulse to the cerebrum.
In light of the above statements,select the correct answer from the options given below.

Arbor vitae is composed of

Sub-arachnoid space is found in:

The association areas are present in the