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

1. Cytokinin

2. Gibberellin

3. Ethylene

4. Abscisic acid

Doubtly Asked 30 Oct 2026 NEET UG 2020 Practice test neet Save WhatsApp Report

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Answer: 2. Gibberellin

Gibberellin promotes stem elongation (internode length). Spraying it on sugarcane raises stem length and hence yield of sugar.

Cytokinin promotes cell division, ethylene ripening, and abscisic acid is a growth inhibitor.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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