In humans,what does the corpus callosum connect?

Where is the posterior choroid plexus found?

Which of the following are controlled by the limbic system?
$(a)$ Emotional reactions
$(b)$ Sexual behavior
$(c)$ Respiration
$(d)$ Vision
$(e)$ Body balance
Choose the correct option.

The location of the 'crura cerebri' is in the...

What is the number of spinal nerves in humans (in $pairs$)?

Match the following human spinal nerves in column-$I$ with the number of pairs in column-$II$ and choose the correct option.

Column-$I$	Column-$II$
$(a)$ Cervical nerves	$(i) \; 5$ pairs
$(b)$ Thoracic nerves	$(ii) \; 1$ pair
$(c)$ Lumbar nerves	$(iii) \; 12$ pairs
$(d)$ Coccygeal nerves	$(iv) \; 8$ pairs