Assertion :The R.Q. value of fats is less than one. Reason: The amount of CO $_{2}$ released is less than the O $_{2}$ consumed when fats are used in respiration.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Both Assertion and Reason are incorrect.

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Respiratory quotient (RQ) or respiratory ratio can be defined as the ratio of the volume of CO $_{2}$ evolved to the volume of O $_{2}$ consumed during respiration. The value of respiratory quotient depends on the type of respiratory substrate. Its value is one for carbohydrates. However, it is always less than one for fats as fats consume more oxygen for respiration than carbohydrates.

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Assertion :The R.Q. value of fats is less than one. Reason: The amount of CO2 released is less than the O2 consumed when fats are used in respiration.

Assertion :The R.Q. value of fats is less than one. Reason: The amount of CO $_{2}$ released is less than the O $_{2}$ consumed when fats are used in respiration.