Which one is paired incorrectly?

Auxin - Isolated from tips of coleoptiles

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Kinetin - Cytokinesis promoting active substance

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Gibberellin - Discovered from fungus Giberella fujikuroi

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Abscisic acid - Volatile substance from ripened oranges

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Solution

The correct option is D Abscisic acid - Volatile substance from ripened oranges
Auxin is isolated from tips of coleoptiles of oat seedlings.

Kinetin is the cytokinesis promoting active substance. It is a type of cytokinin.

Gibberellins are first discovered from a fungal pathogen Gibberella fujikuroi.

Ethylene is the volatile substance from ripened oranges, not abscisic acid.

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