Which was discovered first?

All $GAs$ are .............

The 'bakanae' (foolish seedling) disease in rice was discovered by whom?

$A$ : Seeds do not sprout when $ABA$ is overcome by Gibberellins. $R$ : $GA$ inhibits protein and $RNA$ synthesis.

Which of the following are effects of gibberellins?
$(a)$ It helps overcome apical dominance.
$(b)$ It delays senescence,thus fruits can be left on the tree longer.
$(c)$ Increase in length of axis.
$(d)$ It is used to speed up the malting process in brewing industries.
$(e)$ It induces parthenocarpy.
$(f)$ Promotes female flowers in cucumbers.

The rosette habit of cabbage can be changed by the application of