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| Column $X$ | Column $Y$ |
| $(1)$ Magnesium | $(P)$ Blood clotting |
| $(2)$ Molybdenum | $(Q)$ Constituent of cysteine amino acid |
| $(3)$ Calcium | $(R)$ Essential for nitrogen fixation |
| $(4)$ Sulphur | $(S)$ Activation of enzymes |
| Column-$I$ | Column-$II$ |
| $(A)$ Potassium | $(1)$ Constituent of ferredoxin |
| $(B)$ Sulphur | $(2)$ Involved in stomatal movement |
| $(C)$ Molybdenum | $(3)$ Needed in the synthesis of auxin |
| $(D)$ Zinc | $(4)$ Component of nitrogenase |
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