Plant hormones are usually:

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(D) Plant hormones,also known as phytohormones,are chemical substances that regulate plant growth and development. They are diverse in their chemical

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Aromatic compounds

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(D) Plant hormones,also known as phytohormones,are chemical substances that regulate plant growth and development. They are diverse in their chemical structure. For example,$Auxins$ are indole compounds (aromatic),$Gibberellins$ are terpene derivatives,$Cytokinins$ are adenine derivatives (purines),$Abscisic$ $acid$ is a carotenoid derivative,and $Ethylene$ is a simple gaseous hydrocarbon. Among the given options,many plant hormones possess aromatic rings or are derived from aromatic precursors,making 'Aromatic compounds' the most chemically diverse and accurate classification for the majority of these regulators.

Column-$I$	Column-$II$
$A$. Abscisic acid	$(i)$ Adenine derivative
$B$. Gibberellins	$(ii)$ Indole acetic acid
$C$. Kinetin	$(iii)$ Carotenoid derivative
$D$. Auxin	$(iv)$ Terpenes

Column $I$	Column $II$
$(a)$ Fruit ripener	$(i)$ Abscisic acid
$(b)$ Herbicide	$(ii)$ $2,4-D$
$(c)$ Bolting agent	$(iii)$ $GA_{3}$
$(d)$ Stress hormone	$(iv)$ Ethephon

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Match the following concerning the activity function and the phytohormone involved.
Column $I$ Column $II$
$(a)$ Fruit ripener $(i)$ Abscisic acid
$(b)$ Herbicide $(ii)$ $2,4-D$
$(c)$ Bolting agent $(iii)$ $GA_{3}$
$(d)$ Stress hormone $(iv)$ Ethephon

Select the correct option from the following:

Ephemerals are xerophytes that are:

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