Which of the following is $NOT$ a correct pair?

The protective membrane,$Pia$ $mater$,is . . . . . . of the $CNS$.

Match the structures in Column $I$ with the structures connecting them in Column $II$:

Column $I$	Column $II$
$(a)$ Cerebral hemispheres	$(i)$ Habenular commissure
$(b)$ Two lobes of thyroid gland	(ii) Corpus callosum
$(c)$ Cerebellar hemispheres	(iii) Isthmus
$(d)$ Thalami	(iv) Vermis

Which of the following is $NOT$ affected by damage to the $Vagus$ nerve in humans?

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.

The brain stem is made up of