Choose the incorrect pair.

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(D) The incorrect pair is $ABA$ - flowering hormone.$ABA$ (Abscisic Acid) is primarily known as a growth inhibitor and a stress hormone that promotes

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$ABA$ - flowering hormone

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(D) The incorrect pair is $ABA$ - flowering hormone.$ABA$ (Abscisic Acid) is primarily known as a growth inhibitor and a stress hormone that promotes seed dormancy and stomatal closure.Florigen is the hormone responsible for flowering,not $ABA$.Auxin promotes growth (cell elongation).Gibberellin was first discovered in the fungus $Gibberella$ $fujikuroi$.Cytokinin was first isolated from herring sperm $DNA$ (as kinetin).

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$I.$ 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.
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