Which of the following is incorrect regarding xerophytes?

Match the following columns:

Column-$I$	Column-$II$
$P$. Indole compounds	$I$. $IAA$
$Q$. Adenine derivatives	$II$. $ABA$
$R$. Carotenoid derivatives	$III$. $GA_3$
$S$. Terpenes	$IV$. Kinetin
$T$. $C_2H_4$	$V$. Ethylene

Which of the following is a plant hormone?

Polyploidy can be induced by the application of

$I.$ Kinetin is a degradative substance from $DNA$.
$II.$ $ABA$ is present in all plants including lower plants.
$III.$ Low ratio of cytokinin to auxin favours root formation only.
$IV.$ $ABA$ is synthesized catabolically through glycolysis pathway.
Choose the correct combination of options.

Factors which can modify geotropic responses are