How many separate layers of neurons are present in the cerebral cortex?

The ventricles of the brain are filled with:

Which of the following parts is not a part of the forebrain?

Given below are two statements $:$
Statement-$I$ : The cerebellar hemispheres are connected by a tract of nerve fibres known as the corpus callosum.
Statement-$II$ : The brain stem consists of the midbrain and all parts of the hindbrain.
In the light of the above statements,choose the most appropriate answer from the options given below.

In which part of the following is the vomiting centre situated?

The part of the brain which is involved in interpreting an input,storing input information,and initiating a response in the light of similar past experience is: