The primary and secondary growth of a shoot is inhibited by

Auxin

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Gibberellin

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Cytokinin

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Abscisic acid

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Solution

The correct option is D Abscisic acid
Abscisic acid is a plant hormone. It is growth inhibitor hormone. Its primary role is inhibition of growth of root, shoot, leaf, etc. It inhibits primary and secondary growth of shoot. During stress condition, its concentration increases.
Thus, the correct answer is option D.

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