What structure is the $Crura$ $cerebri$ in the brain composed of?

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

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

Given below are two statements with respect to the limbic system.
Statement $I$: The limbic system is responsible for emotional reactions and memory.
Statement $II$: It is formed mainly of the cerebrum,pons varolii,and cerebellum.
Choose the most appropriate answer from the options given below.

The meninges of the spinal cord consist of which of the following?

Which of the following cranial nerves in man is both sensory and motor?