MCQ
$ K_{2+2} C× 4 A_{2+4}$ ${G_{\underline {(2)} }}$ is floral formula of
- AAllium cepa
- BSolanum nigrum
- CHelianthus annuus
- ✓Brassica nigra
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| Column $I$ | Column $II$ |
| $a.$ Auxin | $(i)$ Root hair formation |
| $b.$ Cytokinin | $(ii)$ Seed development |
| $c.$ Ethylene | $(iii)$ Xylem differentiation |
| $d.$ $ABA$ | $(iv)$ Nutrient mobilisation |