Which of the following is a synthetic auxin?

IAA

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IBA

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ABA

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NAA

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Solution

The correct option is D NAA
Auxins are the plant growth regulators which are generally produced by the growing apices of the stems and roots.

Auxins like IAA and IBA are natural auxins isolated from plants whereas NAA and 2,4-D are synthetic auxins.

ABA is not an auxin. It is abscisic acid, another plant growth regulator.

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