| Column-$I$ | Column-$II$ |
| $a.$ Ethephon | $(i)$ $GA$ |
| $b.$ Terpene | $(ii)$ Ethylene |
| $c.$ Zeatin | $(iii)$ Natural auxin |
| $d.$ $IAA$ | $(iv)$ Cytokinin |
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| Column-$I$ | Column-$II$ |
| $A$. Cytokinin | $i$. Stimulates closure of stomata |
| $B$. Ethylene | $ii$. Increases stem length |
| $C$. Gibberellin | $iii$. Promotes lateral shoot growth |
| $D$. Abscisic acid | $iv$. Found in large amounts in tissues undergoing senescence |
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