Which PGR is most likely responsible for the phenomenon observed when a plant bends towards a light source, even if the light source is unidirectional and doesn't illuminate the entire plant?

One hormone helps in ripening of fruits, while the other stimulates closure of stomata. These are respectively

I. Antagonist to GA

II. Promoted bud dormancy

III. Promoted stomatal closure

IV. Promoted abscission layer

Identify the hormone/s which promote/s all these events in plants and choose the correct option

Which plant hormone promotes seed dormancy, bud dormancy and causes stomatal closure?