The pigment involved in photomorphogenetic movements is

Study the following statements.
$I.$ "$X$" hormone promotes root growth and root hair formation, thus helping the plants to increase their absorption surface.
$II.$ "$Y$" hormone induces flowering in mango and also promotes rapid internode/petiole elongation in deep-water plants, hence helping leaves or upper parts of the shoot remain above water.
$III.$ "$Z$" hormone inhibits seed germination, increases the tolerance of plants to various stresses, and plays an important role in seed development, maturation, and dormancy.
Identify the correct names of hormones marked as $X$, $Y$, and $Z$.

Identify two of the following phytohormones,which regulate the stomatal movements?
$I.$ $IAA$
$II.$ $GA_3$
$III.$ $Zeatin$
$IV.$ $ABA$

Which one of the following pairs of plant hormones inhibits flowering in some plants?

Desert can be converted into greenland by

$6$-furfuryl amino purine $(A)$,$2,4$-dichlorophenoxy acetic acid $(B)$,and indole-$3$-acetic acid $(C)$ are examples respectively of: