Minerals associated with redox reactions are

Na, Cu

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N, Cu

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Fe, Cu

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Ca, Fe

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Solution

The correct option is C Fe, Cu
Fe is an important constituent of proteins like ferredoxin and cytochromes which are involved in the transfer of electrons. It is reversibly oxidised from Fe²⁺ to Fe³⁺during electron transfer. It activates the catalyse enzyme and is essential for the formation of chlorophyll.

Copper helps in the formation of starch. It is required for the overall metabolism in plants. it is associated with certain enzymes involved in redox reactions and is reversibly oxidised from Cu⁺ to Cu²⁺.

Thus, option C - Fe, Cu is correct.

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C r_{2} O_{7}^{2 -} + F e^{2 +} \to C r^{3 +} + F e^{3 +}

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