Which hormone should be used in rosette varieties of beet and cabbage to promote bolting?

What are the full names of the following plant hormones?
$(1)$ $GA$
$(2)$ $ABA$

Specific property attributed to $GA$ is

Gibberellins cause:

Spraying sugarcane crop with which of the following plant growth regulators increases the length of the stem,thus increasing the yield?

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