The brain acts as the $A$ and $B$ system.
Here,$A$ and $B$ refer to:

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:

The central information processing organ of our body is

The parasympathetic nervous system increases the activity of:

Where are the lateral ventricles found?

The mandibular nerve is a branch of which cranial nerve?