A hypothetical chemical believed to be involved in flowering is

Gibberellin

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NAA

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Florigen

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IAA

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Solution

The correct option is B Florigen
Florigen is a hypothetical flower-inducing growth hormone. It is produced in response to a specific period of day length typical of a plant. Florigen is considered to be the same in all the flowering plants.It induces only flowering. It is neither a growth promoter nor a growth inhibitor.
Thus, the correct answer is option C.

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