Which plant growth regulators are required to obtain callus?

Both ethylene and $ABA$ are responsible for

Fill in the blanks:
$(1)$ Maximum growth is observed in ........ phase.
$(2)$ Apical dominance is due to .......

Which of the following are added as growth promoters in culture media?
$(i)$ Ethylene
$(ii)$ Abscisic acid
$(iii)$ Gibberellin
$(iv)$ Auxin
$(v)$ Cytokinin

You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots?

Match the following columns:

Column-$I$	Column-$II$
$A$. Plant growth promoters	$1$. Auxin
$B$. Plant growth inhibitor	$2$. Gibberellin
	$3$. Abscisic acid
	$4$. Cytokinin

Select the correct matching for $A$ and $B$.