Given below are some statements regarding plant growth regulators. A. Abscisic acid acts as an antagonist to gibberellins in most situations. B. Ethylene promotes rapid internode or petiole elongation in deep water rice plants. C. Spraying juvenile conifers with GAs hastens the maturity period, thus leading to early seed production. D. Cytokinins promote leaf senescence by stimulating nutrient mobilisation. E. 2,4-D

Step-by-step solution

Statement A is correct. Abscisic acid (ABA) generally acts as an antagonist to gibberellins (GAs), for example in seed dormancy where ABA promotes dormancy and GA breaks it. Statement B is correct. Ethylene promotes rapid internode or petiole elongation in deep water rice plants, which helps the leaves or upper parts of the shoot to remain above water. Statement C is correct. Spraying juvenile conifers with GAs hastens the maturity period, thus leading to early seed production. Statement D is incorrect. Cytokinins