Which of the following plant growth regulator is a derivative of carotenoid?

Gibberellic acid

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Cytokinin

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Abscisic acid

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Indole-3-acetic acid

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Solution

The correct option is C Abscisic acid
The plant growth regulators are small, simple molecules of diverse chemical composition. Abscisic acid is a derivative of carotenoids.

Gibberellic acid is made up of terpenes (a hydrocarbon that forms the building blocks of some plant hormones).

Cytokinins are a modified form of adenine.

IAA or indole-3-acetic acid are composed of indole groups.

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