Which of the following is used to artificially induce fruit ripening and enhance juiciness?

Recognition of ethylene as a natural plant hormone was done by

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?

Which of the following is a gaseous plant growth regulator?

Which of the following hormone promotes internode/petiole elongation in deep water rice?

Which of the following phytohormones promotes female flowers in cucumber?