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| સ્તંભ $I$ (ધાતુઓ) | સ્તંભ $II$ (સવર્ગ સંયોજનો) |
| $a. Co$ | $i. \text{વિલ્કિન્સન ઉદ્દીપક}$ |
| $b. Zn$ | $ii. \text{ક્લોરોફિલ}$ |
| $c. Rh$ | $iii. \text{વિટામિન } B_{12}$ |
| $d. Mg$ | $iv. \text{કાર્બોનિક એનહાઇડ્રેઝ}$ |
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