The inner part of the cerebral cortex is referred to as:

Given below are two statements:
Statement $I$: The cerebral hemispheres are connected by a nerve tract known as the corpus callosum.
Statement $II$: The brain stem consists of the medulla oblongata,pons,and cerebrum.
In the light of the above statements,choose the most appropriate answer from the options given below:

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

In the diagram of the lateral view of the human brain,parts are indicated by alphabets. Choose the answer in which these alphabets have been correctly matched with the part which they indicate.

The cerebellum is concerned with the

Cerebrospinal fluid $(CSF)$ is produced by