Select the pair that consists of plant growth promoter only.

Auxins and cytokinins

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Gibberellins and ABA

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Ethylene and ABA

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All of these

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Solution

The correct option is A Auxins and cytokinins
Plant growth regulators can be divided into two - plant growth promoters and plant growth inhibitors. Auxins, gibberellins and cytokinins are plant growth promoters while ABA (abscisic acid) is growth inhibitor and ethylene is intermediate type of both but it is largely an inhibitor of growth activities.

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