Name the plant hormone responsible for the growth of stem.

Gibberellin

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Axin

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Cytokinins

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Ethylene

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Solution

The correct option is A Gibberellin
Gibberellin (GA) is one of the plant hormones that regulate a wide range of processes involved in plant growth, organ development, and environmental responses.
Gibberellins are produced in greater mass when the plant is exposed to cold temperatures. They stimulate cell elongation, Growth of stem, breaking and budding, seedless fruits, and seed germination, etc.
Hence the plant hormone responsible for the growth of stem is Gibberellin.
So, the correct answer is 'Gibberlin'.

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