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| Column-$I$ | Column-$II$ |
| $a.$ इथेफोन | $(i)$ $GA$ |
| $b.$ टर्पीन | $(ii)$ एथिलीन |
| $c.$ ज़िएटिन | $(iii)$ प्राकृतिक ऑक्सिन |
| $d.$ $IAA$ | $(iv)$ साइटोकाइनिन |
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