Q. Which of the following plant growth regulators promotes internode elongation prior to flowering in cabbage?
A) Ethephon
B) Abscisic acid
C) Gibberellin
D) Indole butyric acid
Explanation
[Solution from source] Gibberellins cause bolting, the elongation of internodes just before flowering in rosette plants such as cabbage and beet. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.