Control of leaf, flower and fruit abscission and promotion of fruit ripening are functions of

Ethylene

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Auxin

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Gibberellin

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Cytokinin

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Solution

The correct option is B Ethylene
Ethylene is a gaseous hormone. It is also called as ripening hormone as it promotes fruit ripening in plants. It also controls leaf, flower and fruit abscission. It also inhibits the growth of lateral buds.
Thus, the correct answer is option A.

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1.It promotes abscission and senescence of plant organs

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