Bud dormancy is induced by

IAA

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ABA

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Ethylene

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Solution

The correct option is B ABA
Abscisic acid is a plant hormone. It is also called as stress hormone. It causes abscission of leaves. During stress environmental condition, its concentration increases and induces bud dormancy. When favorable condition returns, bud dormancy is broken.
Thus, the correct answer is option C.

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