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Gibberellins (GAs) regulate various developmental processes, including stem elongation, germination, dormancy, flowering, flower development and leaf and fruit senescence. When gibberellin is sprayed on sugarcane crop, the length of the stem increases.

1. Gibberellins regulate stem elongation.
2. Gibberellins regulate germination and dormancy.
3. Gibberellins regulate flowering and senescence.
4. Gibberellins increase sugarcane stem length.

Correct answer: Gibberellins increase sugarcane stem length.

Solution

The question states that spraying gibberellin on sugarcane increases stem length. The correct choice is the one that directly restates this specific outcome, rather than a broader role of gibberellins in plants.

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