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B
CO2 evolved /O2 taken in
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C
O2 taken in /H2O evolved
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D
CO2 taken in H2O evolved
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Solution
The correct option is BCO2 evolved /O2 taken in
The respiratory quotient is used for measurement of basal metabolic rate when estimated from CO2 production. It is measured using a respirometer and is calculated as the the ratio of CO2produced by the body to O2 consumed by the body.
So, the correct option is 'CO2 evolved /O2taken in'