Plant growth regulators (PGRs) have innumerable practical applications

Plant growth regulators (PGRs) have innumerable practical applications. Name the PGR you should use to
(i) increase yield of sugarcane
(ii) promote lateral shoot growth
(iii) cause sprouting of potato tuber
(iv) inhibit seed germination

(i) Gibberellin (ii) Cytokinins
(iii) Gibberellin (iv) Abscisic acid