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

Match the following:
Column-$A$ | Column-$B$
$(1)$ Auxin | $(I)$ Ripening and maturity of fruits
$(2)$ Gibberellin | $(II)$ Differentiation of xylem elements
$(3)$ Cytokinin | $(III)$ Prevention of genetic and physiological dwarfism
$(4)$ Ethylene | $(IV)$ Found from tumour tissue of tobacco

It takes a very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield?

Which one pair is wrong $:-$

Identify the plant growth promoters and plant growth inhibitors.

Rhizocaline is an additional hormonal substance which is secreted by: