Exogenous GA induces the formation of male flowers on genetically female plants of
Gibberellic acid induce male flowers on female plants of Cannabis sativa. When exogenous gibberellin was induced in genetically female plants of Cannabis, there was marked stem elongation and production of male (staminate) flowers in gibberellin treated female plants of Cannabis. Hence, exogenous GA induces the formation of male flowers on genetically female plants of Cannabis. So, the correct answer is 'Cannabis'.