Which part of the brain increases in size from fishes to mammals?

Where are the lateral ventricles found?

Sympathetic nerves in mammals arise from

The cerebellum is concerned with the

Read the following statements carefully and select the correct option:
$I.$ The medulla is connected to the spinal cord.
$II.$ Medulla contains controlling centres for respiration,cardiovascular reflexes and gastric secretion.
$III.$ Cerebellum has a very convoluted surface in order to provide the additional space for more neurons.

The third ventricle of the rabbit's brain is called: