For the purpose of respiration in plants ................... is necessary.

Light

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C O_{2}

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O_{2}

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Chlorophyll

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Solution

The correct option is C $O_{2}$
Plants, like all other living organisms, carry out mitochondrial respiration, the oxidation of substrates to $C O_{2}$ and the conversion of $O_{2}$ to $H_{2} O$ . Oxygen is consumed because respiration is essentially an oxidation process in which reduced substrates (produced in photosynthesis) are oxidised.

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