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| Column-$I$ | Column-$II$ |
| $P$. Phosphorus | $I$. Splitting of water to liberate oxygen during photosynthesis |
| $Q$. Potassium | $II$. Constituent of cell membranes and all nucleotides |
| $R$. Magnesium | $III$. In more abundant quantities in the meristematic tissue,buds,leaves,and root tips |
| $S$. Manganese | $IV$. Constituent of the ring structure of chlorophyll and helps to maintain the ribosome structure |
| 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 |
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