This hormone can replace vernalization

The correct option is Gibberellins.

Vernalization is the process by which flowering in certain plants is promoted or induced by a prolonged exposure to low temperatures (cold treatment). This physiological process is crucial for biennial plants and winter varieties of crops to transition from the vegetative state to the reproductive (flowering) phase.

Gibberellins (specifically Gibberellic Acid or GA) are plant hormones (phytohormones) that regulate various developmental processes, including stem elongation, germination, dormancy, flowering, and leaf and fruit senescence.

Scientific studies and experiments have demonstrated that applying gibberellins to plants that normally require vernalization can induce flowering even in the absence of the cold treatment. The hormone effectively bypasses the low-temperature requirement by triggering the same downstream genetic and physiological pathways that lead to bolting (rapid stem elongation) and subsequent flowering. Therefore, Gibberellins can replace the requirement for vernalization in many plant species.