Which one of the following triggers the ripening of fruits?

Ethylene

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Indoleacetic acid

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Gibberellic acid

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Kinetin

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Solution

The correct option is A Ethylene
Ethylene is the gaseous hormone that stimulates growth and development of floral organs and promotes fruit ripening. It does so by causing softening of fruit due to enzymatic breakdown of cell walls, starch hydrolysis, sugar accumulation and disappearance of organic acids and phenolic compounds. Thus, option A is correct.

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