Which of the following plant growth regulators is responsible for promoting internode elongation just prior to flowering in plants with a rosette habit, such as cabbage and beet?

Step-by-step solution

The phenomenon of internode elongation just prior to flowering in plants with a rosette habit is called bolting. According to NCERT, Gibberellins are known to promote bolting in plants like beet, cabbages, and many other plants with a rosette habit. Auxins are primarily involved in apical dominance and root initiation, ethylene in fruit ripening and senescence, and cytokinins in cell division and delaying leaf senescence. Answer: Gibberellin