The correct option is D 1-C, 2-A, 3-B
Apical dominance occurs when the shoot apex inhibits the growth of lateral buds so that the plant may grow vertically. It is important for the plant to devote energy to growing upward so that it can get more light to undergo photosynthesis. Apical dominance is regulated by two plant hormones, auxins and cytokinins.
Auxin promotes apical dominance whereas cytokinins are known to regulate or control apical dominance.
Gibberellin helps in seed germination.