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Name the plant growth regulators which upon spraying on sugarcane crop, increases the length of stem

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Name the plant growth regulators which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop.

a) Ethylene
b) Abscisic acid
c) Cytokinin
d) Gibberellin

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d) Gibberellin

Explaination::
Gibberellin hormone regulates the growth, elongation of stem. It is able to promote the internode elongation because of which the size of sugarcane increases.

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