Which of the following statements are correct?

(i) Vernalization refers to the promotion of flowering by a period of high temperature.

(ii) The spring variety of crops are normally planted in the spring and come to flower before the end of the growing season.

(iii) It is not seen in biennial plants.

(iv) Subjecting cold treatment to sugar beet will result in flowering.

(v) Cytokinins specially help in delaying senescence.

(vi) Auxins are involved in regulating apical dominance.

(vii) Ethylene is specially useful in enhancing seed germination.

(viii) Gibberellins are responsible for immature falling of leaves.

(ix) Cytokinins promote senescence.

(x) Auxins control apical dominance.

(xi) Gibberellins promote shoot elongation.

(xii) Abscissic acid enables seeds to withstand desiccation.

Choose the correct option given below: