Plant growth substances $(PGS)$ have innumerable practical applications. Name the $PGS$ you should use to:
$(a)$ Increase yield of sugarcane.
$(b)$ Promote lateral shoot growth.
$(c)$ Cause sprouting of potato tuber.
$(d)$ Inhibit seed germination.

(N/A) Gibberellic acid $(GA)$ is used to increase the length of the stem,thereby increasing the yield of sugarcane.
$(b)$ Cytokinins are used to promote lateral shoot growth by overcoming apical dominance.
$(c)$ Ethylene is used to initiate sprouting in potato tubers.
$(d)$ Abscisic acid $(ABA)$ acts as a growth inhibitor and is responsible for inhibiting seed germination.