Which of the following phytohormones promotes female flowers in cucumber?

Horizontal growth of seedling,swelling of axis and apical hook formation in dicot seedling are associated with$:-$

Which of the following is known as the phytogerontological hormone?

Which hormone is produced mostly in all parts of a plant?

Production of cucumber has increased manifold in recent years. Application of which of the following phytohormones has resulted in this increased yield as the hormone is known to produce female flowers in the plants?

The only gaseous plant hormone is . . . . . . .