Rapid and dramatic increase in shoot length is called

Gibberellins promote the formation of $.......$ flowers on genetically $.......$ plants in $Cannabis$,whereas ethylene promotes the formation of $.......$ flowers on genetically $.......$ plants.

Select the correct option for $GA_3$.

Give scientific reasons: Gibberellic acid induces reversal of dwarfism in many genetically dwarf plants.

Give scientific reasons: Rice plants infected by the fungus $Gibberella$ $fujikuroi$ grow foolishly tall.

Describe the discovery of gibberellins.