The branch of science associated with the prevention,diagnosis,and treatment of mental disorders is called:

The nervous system in vertebrates develops from which of the following germ layers?

Select the correct arrangement of neural organization,according to the increasing degree of complexity.

Arrange the following in the correct sequence in the evolution of the nervous system:
$(a)$ Formation of a centralised nervous system.
$(b)$ Diffused nervous system in $Hydra$.
$(c)$ Formation of a ganglion.
$(d)$ Nervous system is lacking in sponges.

In which of the following is a very simple neural organization found?

The olfactory nerve is the .... cranial nerve.