Which of the following is vestigial organ in humans

First respiration arose on earth was

Assertion : The earliest fossil form in the phylogeny of horse is eohippus.

Reason : Eohippus lived during the early pliocene epoch.

The branch which is associated with diagnosis, prevention and cure of mental disorders is

Select the wrong statements

$I.$ Swank-neck flask experiment was performed by Louis Pasteur

$II.$ Louis Pasteur is famous for germ theory of disease

$III.$ Louis Pasteur disapproved spontaneous theory forever

$IV.$ Cosmozoic theory of origin of life was proposed by Richter

$V.$ Theory of catastrophism was given by Georges Cuvier

Choose the correct option